138683713085478 has 48 divisors (see below), whose sum is σ = 328537817539776. Its totient is φ = 41930502185520.

The previous prime is 138683713085441. The next prime is 138683713085483. The reversal of 138683713085478 is 874580317386831.

138683713085478 is a `hidden beast` number, since 1 + 3 + 8 + 6 + 8 + 3 + 71 + 3 + 0 + 8 + 547 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 790457200 + ... + 790632627.

It is an arithmetic number, because the mean of its divisors is an integer number (6844537865412).

Almost surely, 2^{138683713085478} is an apocalyptic number.

138683713085478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

138683713085478 is an abundant number, since it is smaller than the sum of its proper divisors (189854104454298).

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

138683713085478 is a wasteful number, since it uses less digits than its factorization.

138683713085478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581090289 (or 1581090286 counting only the distinct ones).

The product of its (nonzero) digits is 650280960, while the sum is 72.

The spelling of 138683713085478 in words is "one hundred thirty-eight trillion, six hundred eighty-three billion, seven hundred thirteen million, eighty-five thousand, four hundred seventy-eight".