56619657 has 12 divisors (see below), whose sum is σ = 83994820. Its totient is φ = 36726048.

The previous prime is 56619653. The next prime is 56619683. The reversal of 56619657 is 75691665.

It can be written as a sum of positive squares in 2 ways, for example, as 20331081 + 36288576 = 4509^2 + 6024^2 .

It is not a de Polignac number, because 56619657 - 2² = 56619653 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56619653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84682 + ... + 85347.

Almost surely, 2^56619657 is an apocalyptic number.

It is an amenable number.

56619657 is a deficient number, since it is larger than the sum of its proper divisors (27375163).

56619657 is a wasteful number, since it uses less digits than its factorization.

56619657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170072 (or 170069 counting only the distinct ones).

The product of its digits is 340200, while the sum is 45.

The square root of 56619657 is about 7524.6034447006. The cubic root of 56619657 is about 383.9922076869.

The spelling of 56619657 in words is "fifty-six million, six hundred nineteen thousand, six hundred fifty-seven".