99615745872 has 60 divisors (see below), whose sum is σ = 286320498100. Its totient is φ = 32307807744.

The previous prime is 99615745861. The next prime is 99615745877. The reversal of 99615745872 is 27854751699.

99615745872 is a `hidden beast` number, since 9 + 9 + 6 + 1 + 574 + 58 + 7 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 39671078976 + 59944666896 = 199176^2 + 244836^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99615745877) 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 11 ways as a sum of consecutive naturals, for example, 9342997 + ... + 9353652.

Almost surely, 2^99615745872 is an apocalyptic number.

It is an amenable number.

99615745872 is an abundant number, since it is smaller than the sum of its proper divisors (186704752228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99615745872 is a wasteful number, since it uses less digits than its factorization.

99615745872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18696700 (or 18696691 counting only the distinct ones).

The product of its digits is 38102400, while the sum is 63.

The spelling of 99615745872 in words is "ninety-nine billion, six hundred fifteen million, seven hundred forty-five thousand, eight hundred seventy-two".