25163044961 has 2 divisors, whose sum is σ = 25163044962. Its totient is φ = 25163044960.

The previous prime is 25163044939. The next prime is 25163044979. The reversal of 25163044961 is 16944036152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13416820561 + 11746224400 = 115831^2 + 108380^2 .

It is a cyclic number.

It is not a de Polignac number, because 25163044961 - 2⁶ = 25163044897 is a prime.

It is not a weakly prime, because it can be changed into another prime (25163044061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12581522480 + 12581522481.

It is an arithmetic number, because the mean of its divisors is an integer number (12581522481).

Almost surely, 2^25163044961 is an apocalyptic number.

It is an amenable number.

25163044961 is a deficient number, since it is larger than the sum of its proper divisors (1).

25163044961 is an equidigital number, since it uses as much as digits as its factorization.

25163044961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 25163044961 in words is "twenty-five billion, one hundred sixty-three million, forty-four thousand, nine hundred sixty-one".