138705420264 has 64 divisors (see below), whose sum is σ = 356810572800. Its totient is φ = 44907554496.

The previous prime is 138705420247. The next prime is 138705420349. The reversal of 138705420264 is 462024507831.

It is a super-2 number, since 2×138705420264² (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, 190704 + ... + 560159.

It is an arithmetic number, because the mean of its divisors is an integer number (5575165200).

Almost surely, 2^138705420264 is an apocalyptic number.

It is an amenable number.

138705420264 is an abundant number, since it is smaller than the sum of its proper divisors (218105152536).

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

138705420264 is a wasteful number, since it uses less digits than its factorization.

138705420264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751094 (or 751090 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The spelling of 138705420264 in words is "one hundred thirty-eight billion, seven hundred five million, four hundred twenty thousand, two hundred sixty-four".