64072138122 has 24 divisors (see below), whose sum is σ = 138832530564. Its totient is φ = 21355907904.

The previous prime is 64072138099. The next prime is 64072138139. The reversal of 64072138122 is 22183127046.

It is a happy number.

64072138122 is a `hidden beast` number, since 640 + 7 + 2 + 1 + 3 + 8 + 1 + 2 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 63167271561 + 904866561 = 251331^2 + 30081^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 163998 + ... + 393750.

Almost surely, 2^64072138122 is an apocalyptic number.

64072138122 is an abundant number, since it is smaller than the sum of its proper divisors (74760392442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64072138122 is a wasteful number, since it uses less digits than its factorization.

64072138122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245254 (or 245251 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 64072138122 in words is "sixty-four billion, seventy-two million, one hundred thirty-eight thousand, one hundred twenty-two".