25644118902163 has 2 divisors, whose sum is σ = 25644118902164. Its totient is φ = 25644118902162.

The previous prime is 25644118902137. The next prime is 25644118902191. The reversal of 25644118902163 is 36120981144652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25644118902163 - 2⁹ = 25644118901651 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25644118902163.

It is not a weakly prime, because it can be changed into another prime (25644118902113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12822059451081 + 12822059451082.

It is an arithmetic number, because the mean of its divisors is an integer number (12822059451082).

Almost surely, 2^{25644118902163} is an apocalyptic number.

25644118902163 is a deficient number, since it is larger than the sum of its proper divisors (1).

25644118902163 is an equidigital number, since it uses as much as digits as its factorization.

25644118902163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2488320, while the sum is 52.

The spelling of 25644118902163 in words is "twenty-five trillion, six hundred forty-four billion, one hundred eighteen million, nine hundred two thousand, one hundred sixty-three".