25457656 has 48 divisors (see below), whose sum is σ = 56163240. Its totient is φ = 10785600.

The previous prime is 25457639. The next prime is 25457681. The reversal of 25457656 is 65675452.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39271 + ... + 39913.

Almost surely, 2^25457656 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 25457656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28081620).

25457656 is an abundant number, since it is smaller than the sum of its proper divisors (30705584).

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

25457656 is a wasteful number, since it uses less digits than its factorization.

25457656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764 (or 753 counting only the distinct ones).

The product of its digits is 252000, while the sum is 40.

The square root of 25457656 is about 5045.5580464405. The cubic root of 25457656 is about 294.1752545418.

It can be divided in two parts, 2545 and 7656, that added together give a palindrome (10201).

The spelling of 25457656 in words is "twenty-five million, four hundred fifty-seven thousand, six hundred fifty-six".