125153515309 has 2 divisors, whose sum is σ = 125153515310. Its totient is φ = 125153515308.

The previous prime is 125153515271. The next prime is 125153515321. The reversal of 125153515309 is 903515351521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79156134409 + 45997380900 = 281347^2 + 214470^2 .

It is an emirp because it is prime and its reverse (903515351521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125153515309 - 2⁷ = 125153515181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125153515339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62576757654 + 62576757655.

It is an arithmetic number, because the mean of its divisors is an integer number (62576757655).

Almost surely, 2^125153515309 is an apocalyptic number.

It is an amenable number.

125153515309 is a deficient number, since it is larger than the sum of its proper divisors (1).

125153515309 is an equidigital number, since it uses as much as digits as its factorization.

125153515309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 101250, while the sum is 40.

The spelling of 125153515309 in words is "one hundred twenty-five billion, one hundred fifty-three million, five hundred fifteen thousand, three hundred nine".