25656564546 has 12 divisors (see below), whose sum is σ = 55589223222. Its totient is φ = 8552188176.

The previous prime is 25656564529. The next prime is 25656564551. The reversal of 25656564546 is 64546565652.

It is a happy number.

25656564546 is a `hidden beast` number, since 25 + 6 + 5 + 6 + 564 + 54 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13418673921 + 12237890625 = 115839^2 + 110625^2 .

It is a super-3 number, since 3×25656564546³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 25656564492 and 25656564501.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 712682331 + ... + 712682366.

Almost surely, 2^25656564546 is an apocalyptic number.

25656564546 is an abundant number, since it is smaller than the sum of its proper divisors (29932658676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25656564546 is a wasteful number, since it uses less digits than its factorization.

25656564546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425364705 (or 1425364702 counting only the distinct ones).

The product of its digits is 25920000, while the sum is 54.

The spelling of 25656564546 in words is "twenty-five billion, six hundred fifty-six million, five hundred sixty-four thousand, five hundred forty-six".