| Base | Representation |
|---|---|
| bin | 101001111010001101… |
| … | …011000001000000000 |
| 3 | 11022011010102212001200 |
| 4 | 221322031120020000 |
| 5 | 1214130000000000 |
| 6 | 32401150101200 |
| 7 | 3152066455164 |
| oct | 517215301000 |
| 9 | 138133385050 |
| 10 | 45000000000 |
| 11 | 180a236604a |
| 12 | 887a4aa800 |
| 13 | 4321c11147 |
| 14 | 226c66cca4 |
| 15 | 128593d500 |
| hex | a7a358200 |
45000000000 has 330 divisors, whose sum is σ = 162341305269. Its totient is φ = 12000000000.
The previous prime is 44999999971. The next prime is 45000000079. The reversal of 45000000000 is 54.
It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.
It can be written as a sum of positive squares in 6 ways, for example, as 25902971136 + 19097028864 = 160944^2 + 138192^2 .
It is an ABA number since it can be written as A⋅BA, here for A=2, B=150000.
It is a Harshad number since it is a multiple of its sum of digits (9).
It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 32 ways as a sum of consecutive naturals, for example, 8999999998 + ... + 9000000002.
Almost surely, 245000000000 is an apocalyptic number.
45000000000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 45000000000
45000000000 is an abundant number, since it is smaller than the sum of its proper divisors (117341305269).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
45000000000 is an frugal number, since it uses more digits than its factorization.
45000000000 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 74 (or 10 counting only the distinct ones).
The product of its (nonzero) digits is 20, while the sum is 9.
Adding to 45000000000 its reverse (54), we get a palindrome (45000000054).
Multiplying 45000000000 by its reverse (54), we get a 5-th power (2430000000000 = 3005).
The spelling of 45000000000 in words is "forty-five billion", and thus it is an aban number and an uban number.
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