25920663552 has 260 divisors, whose sum is σ = 88502247856. Its totient is φ = 7405240320.

The previous prime is 25920663523. The next prime is 25920663553. The reversal of 25920663552 is 25536602952.

25920663552 is a `hidden beast` number, since 2 + 5 + 9 + 2 + 0 + 6 + 635 + 5 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 25920663498 and 25920663507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25920663553) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2316852 + ... + 2328012.

Almost surely, 2^25920663552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25920663552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44251123928).

25920663552 is an abundant number, since it is smaller than the sum of its proper divisors (62581584304).

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

25920663552 is an equidigital number, since it uses as much as digits as its factorization.

25920663552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11204 (or 11173 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 45.

The spelling of 25920663552 in words is "twenty-five billion, nine hundred twenty million, six hundred sixty-three thousand, five hundred fifty-two".