56489970877 has 2 divisors, whose sum is σ = 56489970878. Its totient is φ = 56489970876.

The previous prime is 56489970851. The next prime is 56489970907. The reversal of 56489970877 is 77807998465.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32792139396 + 23697831481 = 181086^2 + 153941^2 .

It is a cyclic number.

It is not a de Polignac number, because 56489970877 - 2⁷ = 56489970749 is a prime.

It is a super-2 number, since 2×56489970877² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56489970827) 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, 28244985438 + 28244985439.

It is an arithmetic number, because the mean of its divisors is an integer number (28244985439).

Almost surely, 2^56489970877 is an apocalyptic number.

It is an amenable number.

56489970877 is a deficient number, since it is larger than the sum of its proper divisors (1).

56489970877 is an equidigital number, since it uses as much as digits as its factorization.

56489970877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 213373440, while the sum is 70.

The spelling of 56489970877 in words is "fifty-six billion, four hundred eighty-nine million, nine hundred seventy thousand, eight hundred seventy-seven".