56556738377 has 2 divisors, whose sum is σ = 56556738378. Its totient is φ = 56556738376.

The previous prime is 56556738367. The next prime is 56556738437. The reversal of 56556738377 is 77383765565.

It is a happy number.

56556738377 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51440054416 + 5116683961 = 226804^2 + 71531^2 .

It is a cyclic number.

It is not a de Polignac number, because 56556738377 - 2⁶ = 56556738313 is a prime.

It is not a weakly prime, because it can be changed into another prime (56556738307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28278369188 + 28278369189.

It is an arithmetic number, because the mean of its divisors is an integer number (28278369189).

Almost surely, 2^56556738377 is an apocalyptic number.

It is an amenable number.

56556738377 is a deficient number, since it is larger than the sum of its proper divisors (1).

56556738377 is an equidigital number, since it uses as much as digits as its factorization.

56556738377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 111132000, while the sum is 62.

The spelling of 56556738377 in words is "fifty-six billion, five hundred fifty-six million, seven hundred thirty-eight thousand, three hundred seventy-seven".