778173310979 has 16 divisors (see below), whose sum is σ = 800216064000. Its totient is φ = 756361093344.

The previous prime is 778173310961. The next prime is 778173310997. The reversal of 778173310979 is 979013371877.

778173310979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (778173310961) and next prime (778173310997).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-778173310979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (778173390979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69233042 + ... + 69244280.

It is an arithmetic number, because the mean of its divisors is an integer number (50013504000).

Almost surely, 2^778173310979 is an apocalyptic number.

778173310979 is a deficient number, since it is larger than the sum of its proper divisors (22042753021).

778173310979 is a wasteful number, since it uses less digits than its factorization.

778173310979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21322.

The product of its (nonzero) digits is 14002632, while the sum is 62.

The spelling of 778173310979 in words is "seven hundred seventy-eight billion, one hundred seventy-three million, three hundred ten thousand, nine hundred seventy-nine".