138418556484 has 48 divisors (see below), whose sum is σ = 362943649152. Its totient is φ = 40738570752.

The previous prime is 138418556407. The next prime is 138418556501. The reversal of 138418556484 is 484655814831.

It is a super-2 number, since 2×138418556484² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19285509 + ... + 19292684.

It is an arithmetic number, because the mean of its divisors is an integer number (7561326024).

Almost surely, 2^138418556484 is an apocalyptic number.

It is an amenable number.

138418556484 is an abundant number, since it is smaller than the sum of its proper divisors (224525092668).

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

138418556484 is a wasteful number, since it uses less digits than its factorization.

138418556484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38578236 (or 38578234 counting only the distinct ones).

The product of its digits is 14745600, while the sum is 57.

The spelling of 138418556484 in words is "one hundred thirty-eight billion, four hundred eighteen million, five hundred fifty-six thousand, four hundred eighty-four".