25656643353 has 16 divisors (see below), whose sum is σ = 37591160256. Its totient is φ = 15435978240.

The previous prime is 25656643319. The next prime is 25656643357. The reversal of 25656643353 is 35334665652.

It is a happy number.

It is not a de Polignac number, because 25656643353 - 2⁸ = 25656643097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25656643357) 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, 2832976 + ... + 2842017.

It is an arithmetic number, because the mean of its divisors is an integer number (2349447516).

Almost surely, 2^25656643353 is an apocalyptic number.

It is an amenable number.

25656643353 is a deficient number, since it is larger than the sum of its proper divisors (11934516903).

25656643353 is a wasteful number, since it uses less digits than its factorization.

25656643353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5675144.

The product of its digits is 5832000, while the sum is 48.

The spelling of 25656643353 in words is "twenty-five billion, six hundred fifty-six million, six hundred forty-three thousand, three hundred fifty-three".