138931280484 has 24 divisors (see below), whose sum is σ = 324180661728. Its totient is φ = 46309330560.

The previous prime is 138931280459. The next prime is 138931280503. The reversal of 138931280484 is 484082139831.

It is a happy number.

It is a super-3 number, since 3×138931280484³ (a number of 34 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 515179 + ... + 737069.

It is an arithmetic number, because the mean of its divisors is an integer number (13507527572).

Almost surely, 2^138931280484 is an apocalyptic number.

It is an amenable number.

138931280484 is an abundant number, since it is smaller than the sum of its proper divisors (185249381244).

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

138931280484 is a wasteful number, since it uses less digits than its factorization.

138931280484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274075 (or 274073 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 51.

The spelling of 138931280484 in words is "one hundred thirty-eight billion, nine hundred thirty-one million, two hundred eighty thousand, four hundred eighty-four".