391379454136 has 16 divisors (see below), whose sum is σ = 800548883640. Its totient is φ = 177899751840.

The previous prime is 391379454097. The next prime is 391379454143. The reversal of 391379454136 is 631454973193.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2223746811 + ... + 2223746986.

Almost surely, 2^391379454136 is an apocalyptic number.

It is an amenable number.

391379454136 is an abundant number, since it is smaller than the sum of its proper divisors (409169429504).

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

391379454136 is a wasteful number, since it uses less digits than its factorization.

391379454136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4447493814 (or 4447493810 counting only the distinct ones).

The product of its digits is 7348320, while the sum is 55.

The spelling of 391379454136 in words is "three hundred ninety-one billion, three hundred seventy-nine million, four hundred fifty-four thousand, one hundred thirty-six".