Base | Representation |
---|---|
bin | 101110100011100101… |
… | …0000000000000000001 |
3 | 100120001122100020200110 |
4 | 1131013022000000001 |
5 | 3114223340122320 |
6 | 113532420341533 |
7 | 10136356262646 |
oct | 1350712000001 |
9 | 316048306613 |
10 | 99978051585 |
11 | 39445004a15 |
12 | 174625448a9 |
13 | 95740c6509 |
14 | 4ba6189dcd |
15 | 29023515e0 |
hex | 1747280001 |
99978051585 has 32 divisors (see below), whose sum is σ = 170018933760. Its totient is φ = 50024772288.
The previous prime is 99978051577. The next prime is 99978051587. The reversal of 99978051585 is 58515087999.
It is a happy number.
It is not a de Polignac number, because 99978051585 - 23 = 99978051577 is a prime.
It is a super-2 number, since 2×999780515852 (a number of 23 digits) contains 22 as substring.
It is not an unprimeable number, because it can be changed into a prime (99978051587) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1673559 + ... + 1732268.
It is an arithmetic number, because the mean of its divisors is an integer number (5313091680).
It is a Proth number, since it is equal to 190693 ⋅ 219 + 1 and 190693 < 219.
Almost surely, 299978051585 is an apocalyptic number.
99978051585 is a gapful number since it is divisible by the number (95) formed by its first and last digit.
It is an amenable number.
99978051585 is a deficient number, since it is larger than the sum of its proper divisors (70040882175).
99978051585 is a wasteful number, since it uses less digits than its factorization.
99978051585 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3405957.
The product of its (nonzero) digits is 40824000, while the sum is 66.
The spelling of 99978051585 in words is "ninety-nine billion, nine hundred seventy-eight million, fifty-one thousand, five hundred eighty-five".
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