56664537020 has 192 divisors, whose sum is σ = 156615088896. Its totient is φ = 16710451200.

The previous prime is 56664536977. The next prime is 56664537023. The reversal of 56664537020 is 2073546665.

It is a happy number.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56664537023) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3115874 + ... + 3134006.

It is an arithmetic number, because the mean of its divisors is an integer number (815703588).

Almost surely, 2^56664537020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56664537020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78307544448).

56664537020 is an abundant number, since it is smaller than the sum of its proper divisors (99950551876).

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

56664537020 is a wasteful number, since it uses less digits than its factorization.

56664537020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18280 (or 18278 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 44.

The spelling of 56664537020 in words is "fifty-six billion, six hundred sixty-four million, five hundred thirty-seven thousand, twenty".