125401660537 has 2 divisors, whose sum is σ = 125401660538. Its totient is φ = 125401660536.

The previous prime is 125401660511. The next prime is 125401660603. The reversal of 125401660537 is 735066104521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109709338176 + 15692322361 = 331224^2 + 125269^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125401660537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125401660537.

It is not a weakly prime, because it can be changed into another prime (125401660337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62700830268 + 62700830269.

It is an arithmetic number, because the mean of its divisors is an integer number (62700830269).

Almost surely, 2^125401660537 is an apocalyptic number.

It is an amenable number.

125401660537 is a deficient number, since it is larger than the sum of its proper divisors (1).

125401660537 is an equidigital number, since it uses as much as digits as its factorization.

125401660537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 40.

The spelling of 125401660537 in words is "one hundred twenty-five billion, four hundred one million, six hundred sixty thousand, five hundred thirty-seven".