39391000056 has 64 divisors (see below), whose sum is σ = 109523210400. Its totient is φ = 13117881600.

The previous prime is 39391000031. The next prime is 39391000069. The reversal of 39391000056 is 65000019393.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 143236 + ... + 315116.

Almost surely, 2^39391000056 is an apocalyptic number.

39391000056 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

39391000056 is the 114588-th octagonal number.

It is an amenable number.

39391000056 is an abundant number, since it is smaller than the sum of its proper divisors (70132210344).

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

39391000056 is a wasteful number, since it uses less digits than its factorization.

39391000056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172957 (or 172947 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 36.

The spelling of 39391000056 in words is "thirty-nine billion, three hundred ninety-one million, fifty-six", and thus it is an aban number.