38681991915 has 32 divisors (see below), whose sum is σ = 71892350976. Its totient is φ = 17393304960.

The previous prime is 38681991889. The next prime is 38681991949. The reversal of 38681991915 is 51919918683.

It is not a de Polignac number, because 38681991915 - 2⁸ = 38681991659 is a prime.

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, 3013267 + ... + 3026076.

It is an arithmetic number, because the mean of its divisors is an integer number (2246635968).

Almost surely, 2^38681991915 is an apocalyptic number.

38681991915 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

38681991915 is a deficient number, since it is larger than the sum of its proper divisors (33210359061).

38681991915 is a wasteful number, since it uses less digits than its factorization.

38681991915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6039419.

The product of its digits is 4199040, while the sum is 60.

The spelling of 38681991915 in words is "thirty-eight billion, six hundred eighty-one million, nine hundred ninety-one thousand, nine hundred fifteen".