125306853569 has 2 divisors, whose sum is σ = 125306853570. Its totient is φ = 125306853568.

The previous prime is 125306853527. The next prime is 125306853599. The reversal of 125306853569 is 965358603521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110630742544 + 14676111025 = 332612^2 + 121145^2 .

It is a cyclic number.

It is not a de Polignac number, because 125306853569 - 2³² = 121011886273 is a prime.

It is a super-2 number, since 2×125306853569² (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 125306853569.

It is not a weakly prime, because it can be changed into another prime (125306853599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62653426784 + 62653426785.

It is an arithmetic number, because the mean of its divisors is an integer number (62653426785).

Almost surely, 2^125306853569 is an apocalyptic number.

It is an amenable number.

125306853569 is a deficient number, since it is larger than the sum of its proper divisors (1).

125306853569 is an equidigital number, since it uses as much as digits as its factorization.

125306853569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832000, while the sum is 53.

The spelling of 125306853569 in words is "one hundred twenty-five billion, three hundred six million, eight hundred fifty-three thousand, five hundred sixty-nine".