56331326640 has 80 divisors (see below), whose sum is σ = 174679462656. Its totient is φ = 15017184000.

The previous prime is 56331326629. The next prime is 56331326647. The reversal of 56331326640 is 4662313365.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×56331326640² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56331326647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 809215 + ... + 876065.

Almost surely, 2^56331326640 is an apocalyptic number.

It is an amenable number.

56331326640 is an abundant number, since it is smaller than the sum of its proper divisors (118348136016).

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

56331326640 is a wasteful number, since it uses less digits than its factorization.

56331326640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70378 (or 70372 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 39.

The spelling of 56331326640 in words is "fifty-six billion, three hundred thirty-one million, three hundred twenty-six thousand, six hundred forty".