25045320105517 has 2 divisors, whose sum is σ = 25045320105518. Its totient is φ = 25045320105516.

The previous prime is 25045320105251. The next prime is 25045320105529. The reversal of 25045320105517 is 71550102354052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17298037946281 + 7747282159236 = 4159091^2 + 2783394^2 .

It is a cyclic number.

It is not a de Polignac number, because 25045320105517 - 2¹⁹ = 25045319581229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25045320105517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25045320105557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12522660052758 + 12522660052759.

It is an arithmetic number, because the mean of its divisors is an integer number (12522660052759).

Almost surely, 2^{25045320105517} is an apocalyptic number.

It is an amenable number.

25045320105517 is a deficient number, since it is larger than the sum of its proper divisors (1).

25045320105517 is an equidigital number, since it uses as much as digits as its factorization.

25045320105517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 210000, while the sum is 40.

Adding to 25045320105517 its reverse (71550102354052), we get a palindrome (96595422459569).

The spelling of 25045320105517 in words is "twenty-five trillion, forty-five billion, three hundred twenty million, one hundred five thousand, five hundred seventeen".