125400660641 has 2 divisors, whose sum is σ = 125400660642. Its totient is φ = 125400660640.

The previous prime is 125400660613. The next prime is 125400660647. The reversal of 125400660641 is 146066004521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123932161600 + 1468499041 = 352040^2 + 38321^2 .

It is a cyclic number.

It is not a de Polignac number, because 125400660641 - 2²² = 125396466337 is a prime.

It is not a weakly prime, because it can be changed into another prime (125400660647) 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, 62700330320 + 62700330321.

It is an arithmetic number, because the mean of its divisors is an integer number (62700330321).

Almost surely, 2^125400660641 is an apocalyptic number.

It is an amenable number.

125400660641 is a deficient number, since it is larger than the sum of its proper divisors (1).

125400660641 is an equidigital number, since it uses as much as digits as its factorization.

125400660641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 125400660641 in words is "one hundred twenty-five billion, four hundred million, six hundred sixty thousand, six hundred forty-one".