25556000 has 48 divisors (see below), whose sum is σ = 62800920. Its totient is φ = 10220800.

The previous prime is 25555993. The next prime is 25556021. The reversal of 25556000 is 65552.

It can be written as a sum of positive squares in 4 ways, for example, as 1073296 + 24482704 = 1036^2 + 4948^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 806 + ... + 7194.

Almost surely, 2^25556000 is an apocalyptic number.

25556000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25556000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31400460).

25556000 is an abundant number, since it is smaller than the sum of its proper divisors (37244920).

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

25556000 is an equidigital number, since it uses as much as digits as its factorization.

25556000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6414 (or 6396 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 25556000 is about 5055.2942545415. The cubic root of 25556000 is about 294.5535716173.

The spelling of 25556000 in words is "twenty-five million, five hundred fifty-six thousand".