129515752057 has 2 divisors, whose sum is σ = 129515752058. Its totient is φ = 129515752056.

The previous prime is 129515752039. The next prime is 129515752073. The reversal of 129515752057 is 750257515921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65858443641 + 63657308416 = 256629^2 + 252304^2 .

It is a cyclic number.

It is not a de Polignac number, because 129515752057 - 2¹⁹ = 129515227769 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129515752057.

It is not a weakly prime, because it can be changed into another prime (129515752657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64757876028 + 64757876029.

It is an arithmetic number, because the mean of its divisors is an integer number (64757876029).

Almost surely, 2^129515752057 is an apocalyptic number.

It is an amenable number.

129515752057 is a deficient number, since it is larger than the sum of its proper divisors (1).

129515752057 is an equidigital number, since it uses as much as digits as its factorization.

129515752057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1102500, while the sum is 49.

The spelling of 129515752057 in words is "one hundred twenty-nine billion, five hundred fifteen million, seven hundred fifty-two thousand, fifty-seven".