25560647790 has 64 divisors (see below), whose sum is σ = 62690734080. Its totient is φ = 6666894080.

The previous prime is 25560647779. The next prime is 25560647809. The reversal of 25560647790 is 9774606552.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2633266 + ... + 2642954.

It is an arithmetic number, because the mean of its divisors is an integer number (979542720).

Almost surely, 2^25560647790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25560647790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31345367040).

25560647790 is an abundant number, since it is smaller than the sum of its proper divisors (37130086290).

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

25560647790 is a wasteful number, since it uses less digits than its factorization.

25560647790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11617.

The product of its (nonzero) digits is 3175200, while the sum is 51.

The spelling of 25560647790 in words is "twenty-five billion, five hundred sixty million, six hundred forty-seven thousand, seven hundred ninety".