125408690369 has 2 divisors, whose sum is σ = 125408690370. Its totient is φ = 125408690368.

The previous prime is 125408690333. The next prime is 125408690399. The reversal of 125408690369 is 963096804521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125396016769 + 12673600 = 354113^2 + 3560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125408690369 is a prime.

It is a super-2 number, since 2×125408690369² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 125408690369.

It is not a weakly prime, because it can be changed into another prime (125408690399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62704345184 + 62704345185.

It is an arithmetic number, because the mean of its divisors is an integer number (62704345185).

Almost surely, 2^125408690369 is an apocalyptic number.

It is an amenable number.

125408690369 is a deficient number, since it is larger than the sum of its proper divisors (1).

125408690369 is an equidigital number, since it uses as much as digits as its factorization.

125408690369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2799360, while the sum is 53.

The spelling of 125408690369 in words is "one hundred twenty-five billion, four hundred eight million, six hundred ninety thousand, three hundred sixty-nine".