56161600660 has 72 divisors (see below), whose sum is σ = 131462085888. Its totient is φ = 20134699200.

The previous prime is 56161600657. The next prime is 56161600681. The reversal of 56161600660 is 6600616165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8389 + ... + 335251.

It is an arithmetic number, because the mean of its divisors is an integer number (1825862304).

Almost surely, 2^56161600660 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 56161600660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65731042944).

56161600660 is an abundant number, since it is smaller than the sum of its proper divisors (75300485228).

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

56161600660 is a wasteful number, since it uses less digits than its factorization.

56161600660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326965 (or 326952 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 56161600660 in words is "fifty-six billion, one hundred sixty-one million, six hundred thousand, six hundred sixty".