90934918722 has 162 divisors, whose sum is σ = 217027159713. Its totient is φ = 27511916544.

The previous prime is 90934918717. The next prime is 90934918793. The reversal of 90934918722 is 22781943909.

It can be written as a sum of positive squares in 14 ways, for example, as 875508921 + 90059409801 = 29589^2 + 300099^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=213231.

It is a super-2 number, since 2×90934918722² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 804733738 + ... + 804733850.

Almost surely, 2^90934918722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90934918722

90934918722 is an abundant number, since it is smaller than the sum of its proper divisors (126092240991).

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

90934918722 is a wasteful number, since it uses less digits than its factorization.

90934918722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The spelling of 90934918722 in words is "ninety billion, nine hundred thirty-four million, nine hundred eighteen thousand, seven hundred twenty-two".