56791657 has 16 divisors (see below), whose sum is σ = 63962640. Its totient is φ = 50061312.

The previous prime is 56791621. The next prime is 56791661. The reversal of 56791657 is 75619765.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 10265616 + 46526041 = 3204^2 + 6821^2 .

It is not a de Polignac number, because 56791657 - 2⁷ = 56791529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56791607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35793 + ... + 37345.

It is an arithmetic number, because the mean of its divisors is an integer number (3997665).

Almost surely, 2^56791657 is an apocalyptic number.

It is an amenable number.

56791657 is a deficient number, since it is larger than the sum of its proper divisors (7170983).

56791657 is a wasteful number, since it uses less digits than its factorization.

56791657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1692.

The product of its digits is 396900, while the sum is 46.

The square root of 56791657 is about 7536.0239516605. The cubic root of 56791657 is about 384.3806469481.

The spelling of 56791657 in words is "fifty-six million, seven hundred ninety-one thousand, six hundred fifty-seven".