56221161560 has 64 divisors (see below), whose sum is σ = 127925740800. Its totient is φ = 22235262336.

The previous prime is 56221161559. The next prime is 56221161589. The reversal of 56221161560 is 6516112265.

It is a self number, because there is not a number n which added to its sum of digits gives 56221161560.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2704727 + ... + 2725433.

It is an arithmetic number, because the mean of its divisors is an integer number (1998839700).

Almost surely, 2^56221161560 is an apocalyptic number.

It is an amenable number.

56221161560 is an abundant number, since it is smaller than the sum of its proper divisors (71704579240).

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

56221161560 is a wasteful number, since it uses less digits than its factorization.

56221161560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21480 (or 21476 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 56221161560 in words is "fifty-six billion, two hundred twenty-one million, one hundred sixty-one thousand, five hundred sixty".