138601726166 has 4 divisors (see below), whose sum is σ = 207902589252. Its totient is φ = 69300863082.

The previous prime is 138601726157. The next prime is 138601726183. The reversal of 138601726166 is 661627106831.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 138601726166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34650431540 + ... + 34650431543.

It is an arithmetic number, because the mean of its divisors is an integer number (51975647313).

Almost surely, 2^138601726166 is an apocalyptic number.

138601726166 is a deficient number, since it is larger than the sum of its proper divisors (69300863086).

138601726166 is an equidigital number, since it uses as much as digits as its factorization.

138601726166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69300863085.

The product of its (nonzero) digits is 435456, while the sum is 47.

The spelling of 138601726166 in words is "one hundred thirty-eight billion, six hundred one million, seven hundred twenty-six thousand, one hundred sixty-six".