125950407949 has 2 divisors, whose sum is σ = 125950407950. Its totient is φ = 125950407948.

The previous prime is 125950407931. The next prime is 125950407953. The reversal of 125950407949 is 949704059521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113171688100 + 12778719849 = 336410^2 + 113043^2 .

It is a cyclic number.

It is not a de Polignac number, because 125950407949 - 2¹⁵ = 125950375181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125950407949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125950407049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62975203974 + 62975203975.

It is an arithmetic number, because the mean of its divisors is an integer number (62975203975).

Almost surely, 2^125950407949 is an apocalyptic number.

It is an amenable number.

125950407949 is a deficient number, since it is larger than the sum of its proper divisors (1).

125950407949 is an equidigital number, since it uses as much as digits as its factorization.

125950407949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4082400, while the sum is 55.

The spelling of 125950407949 in words is "one hundred twenty-five billion, nine hundred fifty million, four hundred seven thousand, nine hundred forty-nine".