90271788656 has 40 divisors (see below), whose sum is σ = 199902142944. Its totient is φ = 38685081600.

The previous prime is 90271788619. The next prime is 90271788697. The reversal of 90271788656 is 65688717209.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 90271788595 and 90271788604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2400656 + ... + 2437968.

Almost surely, 2^90271788656 is an apocalyptic number.

It is an amenable number.

90271788656 is an abundant number, since it is smaller than the sum of its proper divisors (109630354288).

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

90271788656 is a wasteful number, since it uses less digits than its factorization.

90271788656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58929 (or 58923 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 59.

The spelling of 90271788656 in words is "ninety billion, two hundred seventy-one million, seven hundred eighty-eight thousand, six hundred fifty-six".