138091726756 has 6 divisors (see below), whose sum is σ = 241660521830. Its totient is φ = 69045863376.

The previous prime is 138091726679. The next prime is 138091726757. The reversal of 138091726756 is 657627190831.

It can be written as a sum of positive squares in only one way, i.e., 115300993600 + 22790733156 = 339560^2 + 150966^2 .

It is a junction number, because it is equal to n+sod(n) for n = 138091726697 and 138091726706.

It is not an unprimeable number, because it can be changed into a prime (138091726757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17261465841 + ... + 17261465848.

Almost surely, 2^138091726756 is an apocalyptic number.

It is an amenable number.

138091726756 is a deficient number, since it is larger than the sum of its proper divisors (103568795074).

138091726756 is a wasteful number, since it uses less digits than its factorization.

138091726756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34522931693 (or 34522931691 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 55.

The spelling of 138091726756 in words is "one hundred thirty-eight billion, ninety-one million, seven hundred twenty-six thousand, seven hundred fifty-six".