138474474831 has 128 divisors (see below), whose sum is σ = 273449779200. Its totient is φ = 67044257280.

The previous prime is 138474474793. The next prime is 138474474857.

It is a happy number.

138474474831 is a `hidden beast` number, since 13 + 84 + 7 + 4 + 474 + 83 + 1 = 666.

138474474831 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 138474474831 - 2⁹ = 138474474319 is a prime.

It is a super-2 number, since 2×138474474831² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138474474871) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3621310 + ... + 3659348.

It is an arithmetic number, because the mean of its divisors is an integer number (2136326400).

Almost surely, 2^138474474831 is an apocalyptic number.

138474474831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

138474474831 is a deficient number, since it is larger than the sum of its proper divisors (134975304369).

138474474831 is a wasteful number, since it uses less digits than its factorization.

138474474831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38186 (or 38180 counting only the distinct ones).

The product of its digits is 7225344, while the sum is 54.

The spelling of 138474474831 in words is "one hundred thirty-eight billion, four hundred seventy-four million, four hundred seventy-four thousand, eight hundred thirty-one".