90856524099 has 16 divisors (see below), whose sum is σ = 139110468480. Its totient is φ = 52166424960.

The previous prime is 90856524091. The next prime is 90856524119. The reversal of 90856524099 is 99042565809.

It is not a de Polignac number, because 90856524099 - 2³ = 90856524091 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (90856524091) 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 15 ways as a sum of consecutive naturals, for example, 72452742 + ... + 72453995.

It is an arithmetic number, because the mean of its divisors is an integer number (8694404280).

Almost surely, 2^90856524099 is an apocalyptic number.

90856524099 is a deficient number, since it is larger than the sum of its proper divisors (48253944381).

90856524099 is a wasteful number, since it uses less digits than its factorization.

90856524099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144906770.

The product of its (nonzero) digits is 6998400, while the sum is 57.

The spelling of 90856524099 in words is "ninety billion, eight hundred fifty-six million, five hundred twenty-four thousand, ninety-nine".