56736761 has 2 divisors, whose sum is σ = 56736762. Its totient is φ = 56736760.

The previous prime is 56736751. The next prime is 56736781. The reversal of 56736761 is 16763765.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55428025 + 1308736 = 7445^2 + 1144^2 .

It is a cyclic number.

It is not a de Polignac number, because 56736761 - 2¹⁰ = 56735737 is a prime.

It is a super-2 number, since 2×56736761² = 6438120097542242, which contains 22 as substring.

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 (56736721) 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, 28368380 + 28368381.

It is an arithmetic number, because the mean of its divisors is an integer number (28368381).

Almost surely, 2^56736761 is an apocalyptic number.

It is an amenable number.

56736761 is a deficient number, since it is larger than the sum of its proper divisors (1).

56736761 is an equidigital number, since it uses as much as digits as its factorization.

56736761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158760, while the sum is 41.

The square root of 56736761 is about 7532.3808321141. The cubic root of 56736761 is about 384.2567569049.

The spelling of 56736761 in words is "fifty-six million, seven hundred thirty-six thousand, seven hundred sixty-one".