38668131915 has 32 divisors (see below), whose sum is σ = 74866705920. Its totient is φ = 16637044224.

The previous prime is 38668131893. The next prime is 38668131937. The reversal of 38668131915 is 51913186683.

It is an interprime number because it is at equal distance from previous prime (38668131893) and next prime (38668131937).

It is not a de Polignac number, because 38668131915 - 2¹⁶ = 38668066379 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

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, 10829625 + ... + 10833194.

It is an arithmetic number, because the mean of its divisors is an integer number (2339584560).

Almost surely, 2^38668131915 is an apocalyptic number.

38668131915 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

38668131915 is a deficient number, since it is larger than the sum of its proper divisors (36198574005).

38668131915 is a wasteful number, since it uses less digits than its factorization.

38668131915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21662851.

The product of its digits is 933120, while the sum is 51.

The spelling of 38668131915 in words is "thirty-eight billion, six hundred sixty-eight million, one hundred thirty-one thousand, nine hundred fifteen".