391379454138 has 64 divisors (see below), whose sum is σ = 828964399104. Its totient is φ = 122930808000.

The previous prime is 391379454097. The next prime is 391379454143. The reversal of 391379454138 is 831454973193.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12633748 + ... + 12664688.

It is an arithmetic number, because the mean of its divisors is an integer number (12952568736).

Almost surely, 2^391379454138 is an apocalyptic number.

391379454138 is an abundant number, since it is smaller than the sum of its proper divisors (437584944966).

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

391379454138 is a wasteful number, since it uses less digits than its factorization.

391379454138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32331.

The product of its digits is 9797760, while the sum is 57.

The spelling of 391379454138 in words is "three hundred ninety-one billion, three hundred seventy-nine million, four hundred fifty-four thousand, one hundred thirty-eight".