56717546880 has 128 divisors (see below), whose sum is σ = 181427742720. Its totient is φ = 15071090688.

The previous prime is 56717546861. The next prime is 56717546887. The reversal of 56717546880 is 8864571765.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 56717546880.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56717546887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 491169 + ... + 595551.

It is an arithmetic number, because the mean of its divisors is an integer number (1417404240).

Almost surely, 2^56717546880 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 56717546880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90713871360).

56717546880 is an abundant number, since it is smaller than the sum of its proper divisors (124710195840).

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

56717546880 is a wasteful number, since it uses less digits than its factorization.

56717546880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104688 (or 104676 counting only the distinct ones).

The product of its (nonzero) digits is 11289600, while the sum is 57.

The spelling of 56717546880 in words is "fifty-six billion, seven hundred seventeen million, five hundred forty-six thousand, eight hundred eighty".