977768960897 has 2 divisors, whose sum is σ = 977768960898. Its totient is φ = 977768960896.

The previous prime is 977768960891. The next prime is 977768960939. The reversal of 977768960897 is 798069867779.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 973614384961 + 4154575936 = 986719^2 + 64456^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-977768960897 is a prime.

It is not a weakly prime, because it can be changed into another prime (977768960891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 488884480448 + 488884480449.

It is an arithmetic number, because the mean of its divisors is an integer number (488884480449).

Almost surely, 2^977768960897 is an apocalyptic number.

It is an amenable number.

977768960897 is a deficient number, since it is larger than the sum of its proper divisors (1).

977768960897 is an equidigital number, since it uses as much as digits as its factorization.

977768960897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032758016, while the sum is 83.

The spelling of 977768960897 in words is "nine hundred seventy-seven billion, seven hundred sixty-eight million, nine hundred sixty thousand, eight hundred ninety-seven".