125797522309 has 2 divisors, whose sum is σ = 125797522310. Its totient is φ = 125797522308.

The previous prime is 125797522303. The next prime is 125797522327. The reversal of 125797522309 is 903225797521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85207361409 + 40590160900 = 291903^2 + 201470^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125797522309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125797522303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62898761154 + 62898761155.

It is an arithmetic number, because the mean of its divisors is an integer number (62898761155).

Almost surely, 2^125797522309 is an apocalyptic number.

It is an amenable number.

125797522309 is a deficient number, since it is larger than the sum of its proper divisors (1).

125797522309 is an equidigital number, since it uses as much as digits as its factorization.

125797522309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2381400, while the sum is 52.

The spelling of 125797522309 in words is "one hundred twenty-five billion, seven hundred ninety-seven million, five hundred twenty-two thousand, three hundred nine".