90204558774 has 32 divisors (see below), whose sum is σ = 205366904064. Its totient is φ = 26146248480.

The previous prime is 90204558761. The next prime is 90204558781. The reversal of 90204558774 is 47785540209.

It is a happy number.

It is a super-2 number, since 2×90204558774² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29710129 + ... + 29713164.

It is an arithmetic number, because the mean of its divisors is an integer number (6417715752).

Almost surely, 2^90204558774 is an apocalyptic number.

90204558774 is an abundant number, since it is smaller than the sum of its proper divisors (115162345290).

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

90204558774 is a wasteful number, since it uses less digits than its factorization.

90204558774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59423332.

The product of its (nonzero) digits is 2822400, while the sum is 51.

The spelling of 90204558774 in words is "ninety billion, two hundred four million, five hundred fifty-eight thousand, seven hundred seventy-four".