99020597128 has 16 divisors (see below), whose sum is σ = 188206957980. Its totient is φ = 48832075008.

The previous prime is 99020597113. The next prime is 99020597173. The reversal of 99020597128 is 82179502099.

It can be written as a sum of positive squares in 2 ways, for example, as 96175654884 + 2844942244 = 310122^2 + 53338^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84777325 + ... + 84778492.

Almost surely, 2^99020597128 is an apocalyptic number.

It is an amenable number.

99020597128 is a deficient number, since it is larger than the sum of its proper divisors (89186360852).

99020597128 is a wasteful number, since it uses less digits than its factorization.

99020597128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169555896 (or 169555892 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 52.

The spelling of 99020597128 in words is "ninety-nine billion, twenty million, five hundred ninety-seven thousand, one hundred twenty-eight".