155961750737113 has 2 divisors, whose sum is σ = 155961750737114. Its totient is φ = 155961750737112.

The previous prime is 155961750737099. The next prime is 155961750737189. The reversal of 155961750737113 is 311737057169551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135921158541529 + 20040592195584 = 11658523^2 + 4476672^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155961750737113 is a prime.

It is not a weakly prime, because it can be changed into another prime (155961760737113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77980875368556 + 77980875368557.

It is an arithmetic number, because the mean of its divisors is an integer number (77980875368557).

Almost surely, 2^{155961750737113} is an apocalyptic number.

It is an amenable number.

155961750737113 is a deficient number, since it is larger than the sum of its proper divisors (1).

155961750737113 is an equidigital number, since it uses as much as digits as its factorization.

155961750737113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20837250, while the sum is 61.

The spelling of 155961750737113 in words is "one hundred fifty-five trillion, nine hundred sixty-one billion, seven hundred fifty million, seven hundred thirty-seven thousand, one hundred thirteen".