11631322656 has 60 divisors (see below), whose sum is σ = 34207404462. Its totient is φ = 3877106688.

The previous prime is 11631322649. The next prime is 11631322669. The reversal of 11631322656 is 65622313611.

11631322656 is a `hidden beast` number, since 11 + 631 + 3 + 2 + 2 + 6 + 5 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11625152400 + 6170256 = 107820^2 + 2484^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 11631322656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2241105 + ... + 2246288.

Almost surely, 2^11631322656 is an apocalyptic number.

11631322656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11631322656 is an abundant number, since it is smaller than the sum of its proper divisors (22576081806).

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

11631322656 is an equidigital number, since it uses as much as digits as its factorization.

11631322656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4487415 (or 4487398 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The spelling of 11631322656 in words is "eleven billion, six hundred thirty-one million, three hundred twenty-two thousand, six hundred fifty-six".