90558995979 has 16 divisors (see below), whose sum is σ = 122104442880. Its totient is φ = 59696893440.

The previous prime is 90558995941. The next prime is 90558995981. The reversal of 90558995979 is 97959985509.

It is not a de Polignac number, because 90558995979 - 2²⁸ = 90290560523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90558995979.

It is not an unprimeable number, because it can be changed into a prime (90558995279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 377494 + ... + 568875.

It is an arithmetic number, because the mean of its divisors is an integer number (7631527680).

Almost surely, 2^90558995979 is an apocalyptic number.

90558995979 is a deficient number, since it is larger than the sum of its proper divisors (31545446901).

90558995979 is a wasteful number, since it uses less digits than its factorization.

90558995979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946730.

The product of its (nonzero) digits is 413343000, while the sum is 75.

The spelling of 90558995979 in words is "ninety billion, five hundred fifty-eight million, nine hundred ninety-five thousand, nine hundred seventy-nine".