25566265201 has 16 divisors (see below), whose sum is σ = 27968713344. Its totient is φ = 23274526464.

The previous prime is 25566265177. The next prime is 25566265261. The reversal of 25566265201 is 10256266552.

It is not a de Polignac number, because 25566265201 - 2⁵ = 25566265169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25566265261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94486 + ... + 245071.

It is an arithmetic number, because the mean of its divisors is an integer number (1748044584).

Almost surely, 2^25566265201 is an apocalyptic number.

It is an amenable number.

25566265201 is a deficient number, since it is larger than the sum of its proper divisors (2402448143).

25566265201 is a wasteful number, since it uses less digits than its factorization.

25566265201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339720.

The product of its (nonzero) digits is 216000, while the sum is 40.

The spelling of 25566265201 in words is "twenty-five billion, five hundred sixty-six million, two hundred sixty-five thousand, two hundred one".