138815407092 has 12 divisors (see below), whose sum is σ = 323902616576. Its totient is φ = 46271802360.

The previous prime is 138815407091. The next prime is 138815407103. The reversal of 138815407092 is 290704518831.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×138815407092² (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 (138815407091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5783975284 + ... + 5783975307.

Almost surely, 2^138815407092 is an apocalyptic number.

138815407092 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138815407092 is an abundant number, since it is smaller than the sum of its proper divisors (185087209484).

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

138815407092 is a wasteful number, since it uses less digits than its factorization.

138815407092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11567950598 (or 11567950596 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 48.

The spelling of 138815407092 in words is "one hundred thirty-eight billion, eight hundred fifteen million, four hundred seven thousand, ninety-two".