38631591321 has 16 divisors (see below), whose sum is σ = 51998865600. Its totient is φ = 25509515328.

The previous prime is 38631591319. The next prime is 38631591347. The reversal of 38631591321 is 12319513683.

It is not a de Polignac number, because 38631591321 - 2¹ = 38631591319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38631590321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1037590 + ... + 1074176.

It is an arithmetic number, because the mean of its divisors is an integer number (3249929100).

Almost surely, 2^38631591321 is an apocalyptic number.

It is an amenable number.

38631591321 is a deficient number, since it is larger than the sum of its proper divisors (13367274279).

38631591321 is a wasteful number, since it uses less digits than its factorization.

38631591321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39928.

The product of its digits is 116640, while the sum is 42.

The spelling of 38631591321 in words is "thirty-eight billion, six hundred thirty-one million, five hundred ninety-one thousand, three hundred twenty-one".