138546921580 has 48 divisors (see below), whose sum is σ = 296490015360. Its totient is φ = 54363615488.

The previous prime is 138546921511. The next prime is 138546921581. The reversal of 138546921580 is 85129645831.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (138546921581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11746326 + ... + 11758114.

It is an arithmetic number, because the mean of its divisors is an integer number (6176875320).

Almost surely, 2^138546921580 is an apocalyptic number.

138546921580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138546921580 is an abundant number, since it is smaller than the sum of its proper divisors (157943093780).

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

138546921580 is a wasteful number, since it uses less digits than its factorization.

138546921580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22938 (or 22936 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 52.

The spelling of 138546921580 in words is "one hundred thirty-eight billion, five hundred forty-six million, nine hundred twenty-one thousand, five hundred eighty".