25644613005 has 24 divisors (see below), whose sum is σ = 48491632800. Its totient is φ = 12433751520.

The previous prime is 25644612977. The next prime is 25644613021. The reversal of 25644613005 is 50031644652.

25644613005 is a `hidden beast` number, since 2 + 5 + 644 + 6 + 1 + 3 + 0 + 0 + 5 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-25644613005 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25903155 + ... + 25904144.

It is an arithmetic number, because the mean of its divisors is an integer number (2020484700).

Almost surely, 2^25644613005 is an apocalyptic number.

It is an amenable number.

25644613005 is a deficient number, since it is larger than the sum of its proper divisors (22847019795).

25644613005 is a wasteful number, since it uses less digits than its factorization.

25644613005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51807321 (or 51807318 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 25644613005 in words is "twenty-five billion, six hundred forty-four million, six hundred thirteen thousand, five".