25576117568 has 112 divisors (see below), whose sum is σ = 55532024064. Its totient is φ = 11640545280.

The previous prime is 25576117561. The next prime is 25576117573. The reversal of 25576117568 is 86571167552.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25576117561) 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, 4091021 + ... + 4097267.

Almost surely, 2^25576117568 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 25576117568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27766012032).

25576117568 is an abundant number, since it is smaller than the sum of its proper divisors (29955906496).

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

25576117568 is a wasteful number, since it uses less digits than its factorization.

25576117568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6400 (or 6390 counting only the distinct ones).

The product of its digits is 3528000, while the sum is 53.

The spelling of 25576117568 in words is "twenty-five billion, five hundred seventy-six million, one hundred seventeen thousand, five hundred sixty-eight".