25645654651 has 8 divisors (see below), whose sum is σ = 26596159200. Its totient is φ = 24699561600.

The previous prime is 25645654609. The next prime is 25645654733. The reversal of 25645654651 is 15645654652.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25645654651 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25645654595 and 25645654604.

It is not an unprimeable number, because it can be changed into a prime (25645654451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1091031 + ... + 1114288.

It is an arithmetic number, because the mean of its divisors is an integer number (3324519900).

Almost surely, 2^25645654651 is an apocalyptic number.

25645654651 is a deficient number, since it is larger than the sum of its proper divisors (950504549).

25645654651 is a wasteful number, since it uses less digits than its factorization.

25645654651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2205749.

The product of its digits is 4320000, while the sum is 49.

Subtracting from 25645654651 its reverse (15645654652), we obtain a palindrome (9999999999).

The spelling of 25645654651 in words is "twenty-five billion, six hundred forty-five million, six hundred fifty-four thousand, six hundred fifty-one".