25163044993 has 2 divisors, whose sum is σ = 25163044994. Its totient is φ = 25163044992.

The previous prime is 25163044979. The next prime is 25163045009. The reversal of 25163044993 is 39944036152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23582823489 + 1580221504 = 153567^2 + 39752^2 .

It is a cyclic number.

It is not a de Polignac number, because 25163044993 - 2⁵ = 25163044961 is a prime.

It is not a weakly prime, because it can be changed into another prime (25163045993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12581522496 + 12581522497.

It is an arithmetic number, because the mean of its divisors is an integer number (12581522497).

Almost surely, 2^25163044993 is an apocalyptic number.

It is an amenable number.

25163044993 is a deficient number, since it is larger than the sum of its proper divisors (1).

25163044993 is an equidigital number, since it uses as much as digits as its factorization.

25163044993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 699840, while the sum is 46.

The spelling of 25163044993 in words is "twenty-five billion, one hundred sixty-three million, forty-four thousand, nine hundred ninety-three".