138386918926 has 32 divisors (see below), whose sum is σ = 226657320768. Its totient is φ = 63181198080.

The previous prime is 138386918911. The next prime is 138386918939. The reversal of 138386918926 is 629819683831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 676855 + ... + 857266.

It is an arithmetic number, because the mean of its divisors is an integer number (7083041274).

Almost surely, 2^138386918926 is an apocalyptic number.

138386918926 is a deficient number, since it is larger than the sum of its proper divisors (88270401842).

138386918926 is a wasteful number, since it uses less digits than its factorization.

138386918926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1534236.

The product of its digits is 26873856, while the sum is 64.

The spelling of 138386918926 in words is "one hundred thirty-eight billion, three hundred eighty-six million, nine hundred eighteen thousand, nine hundred twenty-six".