791386657878 has 32 divisors (see below), whose sum is σ = 1666629763200. Its totient is φ = 249828687936.

The previous prime is 791386657861. The next prime is 791386657907. The reversal of 791386657878 is 878756683197.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 805551 + ... + 1493882.

It is an arithmetic number, because the mean of its divisors is an integer number (52082180100).

Almost surely, 2^791386657878 is an apocalyptic number.

791386657878 is an abundant number, since it is smaller than the sum of its proper divisors (875243105322).

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

791386657878 is a wasteful number, since it uses less digits than its factorization.

791386657878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2302476.

The product of its digits is 853493760, while the sum is 75.

The spelling of 791386657878 in words is "seven hundred ninety-one billion, three hundred eighty-six million, six hundred fifty-seven thousand, eight hundred seventy-eight".