99356566565399 has 64 divisors (see below), whose sum is σ = 121066468217856. Its totient is φ = 80327856000000.

The previous prime is 99356566565363. The next prime is 99356566565411.

99356566565399 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 99356566565399 - 2²⁴ = 99356549788183 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99356566565399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99356566565099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1158620774 + ... + 1158706524.

It is an arithmetic number, because the mean of its divisors is an integer number (1891663565904).

Almost surely, 2^{99356566565399} is an apocalyptic number.

99356566565399 is a deficient number, since it is larger than the sum of its proper divisors (21709901652457).

99356566565399 is a wasteful number, since it uses less digits than its factorization.

99356566565399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88280.

The product of its digits is 47829690000, while the sum is 86.

The spelling of 99356566565399 in words is "ninety-nine trillion, three hundred fifty-six billion, five hundred sixty-six million, five hundred sixty-five thousand, three hundred ninety-nine".