56577540361 has 2 divisors, whose sum is σ = 56577540362. Its totient is φ = 56577540360.

The previous prime is 56577540359. The next prime is 56577540373. The reversal of 56577540361 is 16304577565.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52415355136 + 4162185225 = 228944^2 + 64515^2 .

It is a cyclic number.

It is not a de Polignac number, because 56577540361 - 2¹ = 56577540359 is a prime.

Together with 56577540359, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (56577540391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28288770180 + 28288770181.

It is an arithmetic number, because the mean of its divisors is an integer number (28288770181).

Almost surely, 2^56577540361 is an apocalyptic number.

It is an amenable number.

56577540361 is a deficient number, since it is larger than the sum of its proper divisors (1).

56577540361 is an equidigital number, since it uses as much as digits as its factorization.

56577540361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2646000, while the sum is 49.

The spelling of 56577540361 in words is "fifty-six billion, five hundred seventy-seven million, five hundred forty thousand, three hundred sixty-one".