56715761 has 2 divisors, whose sum is σ = 56715762. Its totient is φ = 56715760.

The previous prime is 56715739. The next prime is 56715767. The reversal of 56715761 is 16751765.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42510400 + 14205361 = 6520^2 + 3769^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56715761 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (56715767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28357880 + 28357881.

It is an arithmetic number, because the mean of its divisors is an integer number (28357881).

Almost surely, 2^56715761 is an apocalyptic number.

It is an amenable number.

56715761 is a deficient number, since it is larger than the sum of its proper divisors (1).

56715761 is an equidigital number, since it uses as much as digits as its factorization.

56715761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44100, while the sum is 38.

The square root of 56715761 is about 7530.9867215392. The cubic root of 56715761 is about 384.2093426856.

The spelling of 56715761 in words is "fifty-six million, seven hundred fifteen thousand, seven hundred sixty-one".