90807025122 has 90 divisors (see below), whose sum is σ = 216791385915. Its totient is φ = 27470402520.

The previous prime is 90807025073. The next prime is 90807025129. The reversal of 90807025122 is 22152070809.

It can be written as a sum of positive squares in only one way, i.e., 45403512561 + 45403512561 = 213081^2 + 213081^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=213081.

It is a super-2 number, since 2×90807025122² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90807025129) 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 44 ways as a sum of consecutive naturals, for example, 154696513 + ... + 154697099.

Almost surely, 2^90807025122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90807025122

90807025122 is an abundant number, since it is smaller than the sum of its proper divisors (125984360793).

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

90807025122 is an frugal number, since it uses more digits than its factorization.

90807025122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226 (or 603 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The spelling of 90807025122 in words is "ninety billion, eight hundred seven million, twenty-five thousand, one hundred twenty-two".