99557399620 has 96 divisors (see below), whose sum is σ = 255150766080. Its totient is φ = 31893765120.

The previous prime is 99557399581. The next prime is 99557399629. The reversal of 99557399620 is 2699375599.

It is a super-2 number, since 2×99557399620² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99557399629) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 269649 + ... + 521368.

It is an arithmetic number, because the mean of its divisors is an integer number (2657820480).

Almost surely, 2^99557399620 is an apocalyptic number.

It is an amenable number.

99557399620 is an abundant number, since it is smaller than the sum of its proper divisors (155593366460).

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

99557399620 is a wasteful number, since it uses less digits than its factorization.

99557399620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791093 (or 791091 counting only the distinct ones).

The product of its (nonzero) digits is 41334300, while the sum is 64.

The spelling of 99557399620 in words is "ninety-nine billion, five hundred fifty-seven million, three hundred ninety-nine thousand, six hundred twenty".