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8100880019 = 67971246481
BaseRepresentation
bin1111000101101100…
…11001111010010011
3202220120020100021022
413202312121322103
5113042311130034
63415501550055
7404514226001
oct74266317223
922816210238
108100880019
113487810071
1216a0b7532b
139c140433b
1456bc47a71
153262c5b2e
hex1e2d99e93

8100880019 has 8 divisors (see below), whose sum is σ = 8306556048. Its totient is φ = 7897697280.

The previous prime is 8100879977. The next prime is 8100880031. The reversal of 8100880019 is 9100880018.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-8100880019 is a prime.

It is a super-2 number, since 2×81008800192 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8100880079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 616742 + ... + 629739.

It is an arithmetic number, because the mean of its divisors is an integer number (1038319506).

Almost surely, 28100880019 is an apocalyptic number.

8100880019 is a deficient number, since it is larger than the sum of its proper divisors (205676029).

8100880019 is a wasteful number, since it uses less digits than its factorization.

8100880019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246645.

The product of its (nonzero) digits is 4608, while the sum is 35.

The square root of 8100880019 is about 90004.8888616613. Note that the first 4 decimals coincide. The cubic root of 8100880019 is about 2008.3715777011.

Subtracting 8100880019 from its reverse (9100880018), we obtain a palindrome (999999999).

The spelling of 8100880019 in words is "eight billion, one hundred million, eight hundred eighty thousand, nineteen".

Divisors: 1 67 97 6499 1246481 83514227 120908657 8100880019