138581457726 has 16 divisors (see below), whose sum is σ = 277875421200. Its totient is φ = 46075068288.

The previous prime is 138581457697. The next prime is 138581457731. The reversal of 138581457726 is 627754185831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29685211 + ... + 29689878.

It is an arithmetic number, because the mean of its divisors is an integer number (17367213825).

Almost surely, 2^138581457726 is an apocalyptic number.

138581457726 is an abundant number, since it is smaller than the sum of its proper divisors (139293963474).

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

138581457726 is a wasteful number, since it uses less digits than its factorization.

138581457726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59375483.

The product of its digits is 11289600, while the sum is 57.

The spelling of 138581457726 in words is "one hundred thirty-eight billion, five hundred eighty-one million, four hundred fifty-seven thousand, seven hundred twenty-six".