90909155124 has 36 divisors (see below), whose sum is σ = 229808553156. Its totient is φ = 30301678848.

The previous prime is 90909155123. The next prime is 90909155167. The reversal of 90909155124 is 42155190909.

90909155124 is a `hidden beast` number, since 9 + 0 + 9 + 0 + 91 + 551 + 2 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 52249730724 + 38659424400 = 228582^2 + 196620^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 90909155124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90909155123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1033162 + ... + 1117694.

It is an arithmetic number, because the mean of its divisors is an integer number (6383570921).

Almost surely, 2^90909155124 is an apocalyptic number.

It is an amenable number.

90909155124 is an abundant number, since it is smaller than the sum of its proper divisors (138899398032).

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

90909155124 is a wasteful number, since it uses less digits than its factorization.

90909155124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114416 (or 114411 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 45.

The spelling of 90909155124 in words is "ninety billion, nine hundred nine million, one hundred fifty-five thousand, one hundred twenty-four".