37638968731 has 24 divisors (see below), whose sum is σ = 47217027984. Its totient is φ = 29739286080.

The previous prime is 37638968701. The next prime is 37638968771. The reversal of 37638968731 is 13786983673.

37638968731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 37638968731 - 2⁹ = 37638968219 is a prime.

It is a super-2 number, since 2×37638968731² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 37638968731.

It is not an unprimeable number, because it can be changed into a prime (37638968701) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 426616 + ... + 507226.

It is an arithmetic number, because the mean of its divisors is an integer number (1967376166).

Almost surely, 2^37638968731 is an apocalyptic number.

37638968731 is a deficient number, since it is larger than the sum of its proper divisors (9578059253).

37638968731 is a wasteful number, since it uses less digits than its factorization.

37638968731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81371 (or 81364 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 61.

The spelling of 37638968731 in words is "thirty-seven billion, six hundred thirty-eight million, nine hundred sixty-eight thousand, seven hundred thirty-one".