25056421165 has 8 divisors (see below), whose sum is σ = 30081788280. Its totient is φ = 20035748352.

The previous prime is 25056421157. The next prime is 25056421177. The reversal of 25056421165 is 56112465052.

It can be written as a sum of positive squares in 4 ways, for example, as 2287421929 + 22768999236 = 47827^2 + 150894^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25056421165 - 2³ = 25056421157 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1161820 + ... + 1183189.

It is an arithmetic number, because the mean of its divisors is an integer number (3760223535).

Almost surely, 2^25056421165 is an apocalyptic number.

It is an amenable number.

25056421165 is a deficient number, since it is larger than the sum of its proper divisors (5025367115).

25056421165 is a wasteful number, since it uses less digits than its factorization.

25056421165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2347151.

The product of its (nonzero) digits is 72000, while the sum is 37.

The spelling of 25056421165 in words is "twenty-five billion, fifty-six million, four hundred twenty-one thousand, one hundred sixty-five".