25944630163 has 4 divisors (see below), whose sum is σ = 25946163880. Its totient is φ = 25943096448.

The previous prime is 25944630157. The next prime is 25944630181. The reversal of 25944630163 is 36103644952.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25944630163 - 2⁹ = 25944629651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25944630133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 741198 + ... + 775411.

It is an arithmetic number, because the mean of its divisors is an integer number (6486540970).

Almost surely, 2^25944630163 is an apocalyptic number.

25944630163 is a deficient number, since it is larger than the sum of its proper divisors (1533717).

25944630163 is a wasteful number, since it uses less digits than its factorization.

25944630163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1533716.

The product of its (nonzero) digits is 466560, while the sum is 43.

The spelling of 25944630163 in words is "twenty-five billion, nine hundred forty-four million, six hundred thirty thousand, one hundred sixty-three".