125512516117 has 2 divisors, whose sum is σ = 125512516118. Its totient is φ = 125512516116.

The previous prime is 125512516049. The next prime is 125512516127. The reversal of 125512516117 is 711615215521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91827786961 + 33684729156 = 303031^2 + 183534^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125512516117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125512516127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62756258058 + 62756258059.

It is an arithmetic number, because the mean of its divisors is an integer number (62756258059).

Almost surely, 2^125512516117 is an apocalyptic number.

It is an amenable number.

125512516117 is a deficient number, since it is larger than the sum of its proper divisors (1).

125512516117 is an equidigital number, since it uses as much as digits as its factorization.

125512516117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21000, while the sum is 37.

The spelling of 125512516117 in words is "one hundred twenty-five billion, five hundred twelve million, five hundred sixteen thousand, one hundred seventeen".