138941418217688 has 32 divisors (see below), whose sum is σ = 272120147019360. Its totient is φ = 66382228830720.

The previous prime is 138941418217687. The next prime is 138941418217733. The reversal of 138941418217688 is 886712814149831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138941418217687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386266703 + ... + 386626238.

It is an arithmetic number, because the mean of its divisors is an integer number (8503754594355).

Almost surely, 2^{138941418217688} is an apocalyptic number.

It is an amenable number.

138941418217688 is a deficient number, since it is larger than the sum of its proper divisors (133178728801672).

138941418217688 is a wasteful number, since it uses less digits than its factorization.

138941418217688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772893947 (or 772893943 counting only the distinct ones).

The product of its digits is 148635648, while the sum is 71.

The spelling of 138941418217688 in words is "one hundred thirty-eight trillion, nine hundred forty-one billion, four hundred eighteen million, two hundred seventeen thousand, six hundred eighty-eight".