25536945017 has 2 divisors, whose sum is σ = 25536945018. Its totient is φ = 25536945016.

The previous prime is 25536945001. The next prime is 25536945047. The reversal of 25536945017 is 71054963552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25504409401 + 32535616 = 159701^2 + 5704^2 .

It is a cyclic number.

It is not a de Polignac number, because 25536945017 - 2⁴ = 25536945001 is a prime.

It is a super-2 number, since 2×25536945017² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25536945047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12768472508 + 12768472509.

It is an arithmetic number, because the mean of its divisors is an integer number (12768472509).

Almost surely, 2^25536945017 is an apocalyptic number.

It is an amenable number.

25536945017 is a deficient number, since it is larger than the sum of its proper divisors (1).

25536945017 is an equidigital number, since it uses as much as digits as its factorization.

25536945017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134000, while the sum is 47.

The spelling of 25536945017 in words is "twenty-five billion, five hundred thirty-six million, nine hundred forty-five thousand, seventeen".