56816521860 has 96 divisors (see below), whose sum is σ = 181969708032. Its totient is φ = 12975431040.

The previous prime is 56816521847. The next prime is 56816521871. The reversal of 56816521860 is 6812561865.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 434059 + ... + 549581.

It is an arithmetic number, because the mean of its divisors is an integer number (1895517792).

Almost surely, 2^56816521860 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 56816521860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90984854016).

56816521860 is an abundant number, since it is smaller than the sum of its proper divisors (125153186172).

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

56816521860 is a wasteful number, since it uses less digits than its factorization.

56816521860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116713 (or 116711 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 48.

The spelling of 56816521860 in words is "fifty-six billion, eight hundred sixteen million, five hundred twenty-one thousand, eight hundred sixty".