977868909868779 has 16 divisors (see below), whose sum is σ = 1448702445204000. Its totient is φ = 651909112816608.

The previous prime is 977868909868709. The next prime is 977868909868783.

977868909868779 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 977868909868779 - 2¹¹ = 977868909866731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (977868909868709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91912704 + ... + 101998445.

It is an arithmetic number, because the mean of its divisors is an integer number (90543902825250).

Almost surely, 2^{977868909868779} is an apocalyptic number.

977868909868779 is a deficient number, since it is larger than the sum of its proper divisors (470833535335221).

977868909868779 is a wasteful number, since it uses less digits than its factorization.

977868909868779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194097931 (or 194097925 counting only the distinct ones).

The product of its (nonzero) digits is 2322868617216, while the sum is 108.

The spelling of 977868909868779 in words is "nine hundred seventy-seven trillion, eight hundred sixty-eight billion, nine hundred nine million, eight hundred sixty-eight thousand, seven hundred seventy-nine".