138654040816 has 20 divisors (see below), whose sum is σ = 284444687232. Its totient is φ = 65248960256.

The previous prime is 138654040709. The next prime is 138654040853. The reversal of 138654040816 is 618040456831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254878480 + ... + 254879023.

Almost surely, 2^138654040816 is an apocalyptic number.

138654040816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

138654040816 is an abundant number, since it is smaller than the sum of its proper divisors (145790646416).

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

138654040816 is a wasteful number, since it uses less digits than its factorization.

138654040816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509757528 (or 509757522 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 46.

The spelling of 138654040816 in words is "one hundred thirty-eight billion, six hundred fifty-four million, forty thousand, eight hundred sixteen".