25641303165 has 32 divisors (see below), whose sum is σ = 46226592000. Its totient is φ = 13482745920.

The previous prime is 25641303157. The next prime is 25641303197. The reversal of 25641303165 is 56130314652.

25641303165 is a `hidden beast` number, since 2 + 5 + 641 + 3 + 0 + 3 + 1 + 6 + 5 = 666.

It is not a de Polignac number, because 25641303165 - 2³ = 25641303157 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1327990 + ... + 1347159.

It is an arithmetic number, because the mean of its divisors is an integer number (1444581000).

Almost surely, 2^25641303165 is an apocalyptic number.

It is an amenable number.

25641303165 is a deficient number, since it is larger than the sum of its proper divisors (20585288835).

25641303165 is a wasteful number, since it uses less digits than its factorization.

25641303165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2675234 (or 2675228 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The spelling of 25641303165 in words is "twenty-five billion, six hundred forty-one million, three hundred three thousand, one hundred sixty-five".