125313601961 has 2 divisors, whose sum is σ = 125313601962. Its totient is φ = 125313601960.

The previous prime is 125313601943. The next prime is 125313601993. The reversal of 125313601961 is 169106313521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121134625936 + 4178976025 = 348044^2 + 64645^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125313601961 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (125313609961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62656800980 + 62656800981.

It is an arithmetic number, because the mean of its divisors is an integer number (62656800981).

Almost surely, 2^125313601961 is an apocalyptic number.

It is an amenable number.

125313601961 is a deficient number, since it is larger than the sum of its proper divisors (1).

125313601961 is an equidigital number, since it uses as much as digits as its factorization.

125313601961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 38.

The spelling of 125313601961 in words is "one hundred twenty-five billion, three hundred thirteen million, six hundred one thousand, nine hundred sixty-one".