99258720591 has 16 divisors (see below), whose sum is σ = 139318151040. Its totient is φ = 62686268640.

The previous prime is 99258720511. The next prime is 99258720599. The reversal of 99258720591 is 19502785299.

It is not a de Polignac number, because 99258720591 - 2¹¹ = 99258718543 is a prime.

It is a super-2 number, since 2×99258720591² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99258720599) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1353421 + ... + 1424873.

It is an arithmetic number, because the mean of its divisors is an integer number (8707384440).

Almost surely, 2^99258720591 is an apocalyptic number.

99258720591 is a deficient number, since it is larger than the sum of its proper divisors (40059430449).

99258720591 is a wasteful number, since it uses less digits than its factorization.

99258720591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95846.

The product of its (nonzero) digits is 4082400, while the sum is 57.

The spelling of 99258720591 in words is "ninety-nine billion, two hundred fifty-eight million, seven hundred twenty thousand, five hundred ninety-one".