25613406645 has 16 divisors (see below), whose sum is σ = 41001137280. Its totient is φ = 13653921344.

The previous prime is 25613406641. The next prime is 25613406649. The reversal of 25613406645 is 54660431652.

It is an interprime number because it is at equal distance from previous prime (25613406641) and next prime (25613406649).

It is a cyclic number.

It is not a de Polignac number, because 25613406645 - 2² = 25613406641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25613406597 and 25613406606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25613406641) 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, 377790 + ... + 440399.

It is an arithmetic number, because the mean of its divisors is an integer number (2562571080).

Almost surely, 2^25613406645 is an apocalyptic number.

It is an amenable number.

25613406645 is a deficient number, since it is larger than the sum of its proper divisors (15387730635).

25613406645 is a wasteful number, since it uses less digits than its factorization.

25613406645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820284.

The product of its (nonzero) digits is 518400, while the sum is 42.

The spelling of 25613406645 in words is "twenty-five billion, six hundred thirteen million, four hundred six thousand, six hundred forty-five".