56146749977 has 2 divisors, whose sum is σ = 56146749978. Its totient is φ = 56146749976.

The previous prime is 56146749941. The next prime is 56146750061. The reversal of 56146749977 is 77994764165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32536583641 + 23610166336 = 180379^2 + 153656^2 .

It is a cyclic number.

It is not a de Polignac number, because 56146749977 - 2¹⁰ = 56146748953 is a prime.

It is not a weakly prime, because it can be changed into another prime (56146749877) 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, 28073374988 + 28073374989.

It is an arithmetic number, because the mean of its divisors is an integer number (28073374989).

Almost surely, 2^56146749977 is an apocalyptic number.

It is an amenable number.

56146749977 is a deficient number, since it is larger than the sum of its proper divisors (1).

56146749977 is an equidigital number, since it uses as much as digits as its factorization.

56146749977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80015040, while the sum is 65.

The spelling of 56146749977 in words is "fifty-six billion, one hundred forty-six million, seven hundred forty-nine thousand, nine hundred seventy-seven".