56471217664 has 40 divisors (see below), whose sum is σ = 112996136088. Its totient is φ = 28194570240.

The previous prime is 56471217629. The next prime is 56471217721. The reversal of 56471217664 is 46671217465.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273984 + ... + 433600.

Almost surely, 2^56471217664 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 56471217664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56498068044).

56471217664 is an abundant number, since it is smaller than the sum of its proper divisors (56524918424).

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

56471217664 is an equidigital number, since it uses as much as digits as its factorization.

56471217664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160326 (or 160310 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 49.

The spelling of 56471217664 in words is "fifty-six billion, four hundred seventy-one million, two hundred seventeen thousand, six hundred sixty-four".