125668807969 has 2 divisors, whose sum is σ = 125668807970. Its totient is φ = 125668807968.

The previous prime is 125668807951. The next prime is 125668807997. The reversal of 125668807969 is 969708866521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68110560400 + 57558247569 = 260980^2 + 239913^2 .

It is a cyclic number.

It is not a de Polignac number, because 125668807969 - 2¹³ = 125668799777 is a prime.

It is a super-2 number, since 2×125668807969² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (125668807949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62834403984 + 62834403985.

It is an arithmetic number, because the mean of its divisors is an integer number (62834403985).

Almost surely, 2^125668807969 is an apocalyptic number.

It is an amenable number.

125668807969 is a deficient number, since it is larger than the sum of its proper divisors (1).

125668807969 is an equidigital number, since it uses as much as digits as its factorization.

125668807969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78382080, while the sum is 67.

The spelling of 125668807969 in words is "one hundred twenty-five billion, six hundred sixty-eight million, eight hundred seven thousand, nine hundred sixty-nine".