56877543997 has 2 divisors, whose sum is σ = 56877543998. Its totient is φ = 56877543996.

The previous prime is 56877543913. The next prime is 56877544007. The reversal of 56877543997 is 79934577865.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52725803641 + 4151740356 = 229621^2 + 64434^2 .

It is a cyclic number.

It is not a de Polignac number, because 56877543997 - 2⁷ = 56877543869 is a prime.

It is a super-2 number, since 2×56877543997² (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 (56877543907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28438771998 + 28438771999.

It is an arithmetic number, because the mean of its divisors is an integer number (28438771999).

Almost surely, 2^56877543997 is an apocalyptic number.

It is an amenable number.

56877543997 is a deficient number, since it is larger than the sum of its proper divisors (1).

56877543997 is an equidigital number, since it uses as much as digits as its factorization.

56877543997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 400075200, while the sum is 70.

The spelling of 56877543997 in words is "fifty-six billion, eight hundred seventy-seven million, five hundred forty-three thousand, nine hundred ninety-seven".