56556479280 has 320 divisors, whose sum is σ = 213952020480. Its totient is φ = 12077227008.

The previous prime is 56556479233. The next prime is 56556479327. The reversal of 56556479280 is 8297465565.

It is an interprime number because it is at equal distance from previous prime (56556479233) and next prime (56556479327).

It is a self number, because there is not a number n which added to its sum of digits gives 56556479280.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1644501 + ... + 1678539.

It is an arithmetic number, because the mean of its divisors is an integer number (668600064).

Almost surely, 2^56556479280 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 56556479280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106976010240).

56556479280 is an abundant number, since it is smaller than the sum of its proper divisors (157395541200).

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

56556479280 is a wasteful number, since it uses less digits than its factorization.

56556479280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34128 (or 34122 counting only the distinct ones).

The product of its (nonzero) digits is 18144000, while the sum is 57.

The spelling of 56556479280 in words is "fifty-six billion, five hundred fifty-six million, four hundred seventy-nine thousand, two hundred eighty".