38137914981 has 24 divisors (see below), whose sum is σ = 56048147064. Its totient is φ = 24983026560.

The previous prime is 38137914967. The next prime is 38137915007. The reversal of 38137914981 is 18941973183.

It is a happy number.

38137914981 is a `hidden beast` number, since 3 + 81 + 3 + 79 + 1 + 498 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 138650625 + 37999264356 = 11775^2 + 194934^2 .

It is not a de Polignac number, because 38137914981 - 2⁵ = 38137914949 is a prime.

It is a super-2 number, since 2×38137914981² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38137914911) 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, 512515 + ... + 582191.

It is an arithmetic number, because the mean of its divisors is an integer number (2335339461).

Almost surely, 2^38137914981 is an apocalyptic number.

It is an amenable number.

38137914981 is a deficient number, since it is larger than the sum of its proper divisors (17910232083).

38137914981 is a wasteful number, since it uses less digits than its factorization.

38137914981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70741 (or 70738 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The spelling of 38137914981 in words is "thirty-eight billion, one hundred thirty-seven million, nine hundred fourteen thousand, nine hundred eighty-one".