138231480051 has 24 divisors (see below), whose sum is σ = 228525822720. Its totient is φ = 78873741936.

The previous prime is 138231480043. The next prime is 138231480091. The reversal of 138231480051 is 150084132831.

It is not a de Polignac number, because 138231480051 - 2³ = 138231480043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138231479988 and 138231480015.

It is not an unprimeable number, because it can be changed into a prime (138231480091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1563231 + ... + 1649288.

It is an arithmetic number, because the mean of its divisors is an integer number (9521909280).

Almost surely, 2^138231480051 is an apocalyptic number.

138231480051 is a deficient number, since it is larger than the sum of its proper divisors (90294342669).

138231480051 is a wasteful number, since it uses less digits than its factorization.

138231480051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3213215 (or 3213212 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 138231480051 in words is "one hundred thirty-eight billion, two hundred thirty-one million, four hundred eighty thousand, fifty-one".