99659109572 has 48 divisors (see below), whose sum is σ = 199979805312. Its totient is φ = 43013710080.

The previous prime is 99659109523. The next prime is 99659109581. The reversal of 99659109572 is 27590195699.

It is a happy number.

99659109572 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220763 + ... + 498050.

It is an arithmetic number, because the mean of its divisors is an integer number (4166245944).

Almost surely, 2^99659109572 is an apocalyptic number.

99659109572 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

99659109572 is the 168743-rd centered heptagonal number.

It is an amenable number.

99659109572 is an abundant number, since it is smaller than the sum of its proper divisors (100320695740).

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

99659109572 is a wasteful number, since it uses less digits than its factorization.

99659109572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718988 (or 718986 counting only the distinct ones).

The product of its (nonzero) digits is 13778100, while the sum is 62.

The spelling of 99659109572 in words is "ninety-nine billion, six hundred fifty-nine million, one hundred nine thousand, five hundred seventy-two".