56691610 has 12 divisors (see below), whose sum is σ = 102087774. Its totient is φ = 22667120.

The previous prime is 56691589. The next prime is 56691637. The reversal of 56691610 is 1619665.

It can be written as a sum of positive squares in 3 ways, for example, as 6692569 + 49999041 = 2587^2 + 7071^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22620 + ... + 25000.

Almost surely, 2^56691610 is an apocalyptic number.

56691610 is a deficient number, since it is larger than the sum of its proper divisors (45396164).

56691610 is an frugal number, since it uses more digits than its factorization.

56691610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4769 (or 2388 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 56691610 is about 7529.3831088609. The cubic root of 56691610 is about 384.1547996035.

The spelling of 56691610 in words is "fifty-six million, six hundred ninety-one thousand, six hundred ten".