25645654653 has 16 divisors (see below), whose sum is σ = 34614530496. Its totient is φ = 16887040640.

The previous prime is 25645654609. The next prime is 25645654733. The reversal of 25645654653 is 35645654652.

It is a cyclic number.

It is not a de Polignac number, because 25645654653 - 2¹⁶ = 25645589117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25645654596 and 25645654605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25645654753) 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, 1300201 + ... + 1319777.

It is an arithmetic number, because the mean of its divisors is an integer number (2163408156).

Almost surely, 2^25645654653 is an apocalyptic number.

It is an amenable number.

25645654653 is a deficient number, since it is larger than the sum of its proper divisors (8968875843).

25645654653 is a wasteful number, since it uses less digits than its factorization.

25645654653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24924.

The product of its digits is 12960000, while the sum is 51.

Subtracting 25645654653 from its reverse (35645654652), we obtain a palindrome (9999999999).

The spelling of 25645654653 in words is "twenty-five billion, six hundred forty-five million, six hundred fifty-four thousand, six hundred fifty-three".