38712640815 has 24 divisors (see below), whose sum is σ = 69266491008. Its totient is φ = 19980717120.

The previous prime is 38712640789. The next prime is 38712640843. The reversal of 38712640815 is 51804621783.

38712640815 is a `hidden beast` number, since 387 + 1 + 264 + 0 + 8 + 1 + 5 = 666.

It is not a de Polignac number, because 38712640815 - 2⁶ = 38712640751 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13874104 + ... + 13876893.

It is an arithmetic number, because the mean of its divisors is an integer number (2886103792).

Almost surely, 2^38712640815 is an apocalyptic number.

38712640815 is a deficient number, since it is larger than the sum of its proper divisors (30553850193).

38712640815 is a wasteful number, since it uses less digits than its factorization.

38712640815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27751039 (or 27751036 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 38712640815 in words is "thirty-eight billion, seven hundred twelve million, six hundred forty thousand, eight hundred fifteen".