138601726157 has 2 divisors, whose sum is σ = 138601726158. Its totient is φ = 138601726156.

The previous prime is 138601726147. The next prime is 138601726183. The reversal of 138601726157 is 751627106831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107648953801 + 30952772356 = 328099^2 + 175934^2 .

It is a cyclic number.

It is not a de Polignac number, because 138601726157 - 2¹⁰ = 138601725133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138601726117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69300863078 + 69300863079.

It is an arithmetic number, because the mean of its divisors is an integer number (69300863079).

Almost surely, 2^138601726157 is an apocalyptic number.

It is an amenable number.

138601726157 is a deficient number, since it is larger than the sum of its proper divisors (1).

138601726157 is an equidigital number, since it uses as much as digits as its factorization.

138601726157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 423360, while the sum is 47.

The spelling of 138601726157 in words is "one hundred thirty-eight billion, six hundred one million, seven hundred twenty-six thousand, one hundred fifty-seven".