779165847978 has 32 divisors (see below), whose sum is σ = 1790178251136. Its totient is φ = 221465346048.

The previous prime is 779165847973. The next prime is 779165847997. The reversal of 779165847978 is 879748561977.

It is not an unprimeable number, because it can be changed into a prime (779165847973) 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, 48052951 + ... + 48069162.

It is an arithmetic number, because the mean of its divisors is an integer number (55943070348).

Almost surely, 2^779165847978 is an apocalyptic number.

779165847978 is an abundant number, since it is smaller than the sum of its proper divisors (1011012403158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

779165847978 is a wasteful number, since it uses less digits than its factorization.

779165847978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96122318.

The product of its digits is 1493614080, while the sum is 78.

The spelling of 779165847978 in words is "seven hundred seventy-nine billion, one hundred sixty-five million, eight hundred forty-seven thousand, nine hundred seventy-eight".