56561620 has 24 divisors (see below), whose sum is σ = 118921824. Its totient is φ = 22597536.

The previous prime is 56561563. The next prime is 56561621. The reversal of 56561620 is 2616565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56561621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28707 + ... + 30613.

It is an arithmetic number, because the mean of its divisors is an integer number (4955076).

Almost surely, 2^56561620 is an apocalyptic number.

It is an amenable number.

56561620 is an abundant number, since it is smaller than the sum of its proper divisors (62360204).

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

56561620 is a wasteful number, since it uses less digits than its factorization.

56561620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3399 (or 3397 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 56561620 is about 7520.7459736385. The cubic root of 56561620 is about 383.8609613094.

The spelling of 56561620 in words is "fifty-six million, five hundred sixty-one thousand, six hundred twenty".