56772657317 has 2 divisors, whose sum is σ = 56772657318. Its totient is φ = 56772657316.

The previous prime is 56772657307. The next prime is 56772657353. The reversal of 56772657317 is 71375627765.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55220770081 + 1551887236 = 234991^2 + 39394^2 .

It is a cyclic number.

It is not a de Polignac number, because 56772657317 - 2¹⁴ = 56772640933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56772657307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28386328658 + 28386328659.

It is an arithmetic number, because the mean of its divisors is an integer number (28386328659).

Almost surely, 2^56772657317 is an apocalyptic number.

It is an amenable number.

56772657317 is a deficient number, since it is larger than the sum of its proper divisors (1).

56772657317 is an equidigital number, since it uses as much as digits as its factorization.

56772657317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12965400, while the sum is 56.

The spelling of 56772657317 in words is "fifty-six billion, seven hundred seventy-two million, six hundred fifty-seven thousand, three hundred seventeen".