25655500 has 48 divisors (see below), whose sum is σ = 60357024. Its totient is φ = 9470400.

The previous prime is 25655489. The next prime is 25655503. The reversal of 25655500 is 555652.

It is not an unprimeable number, because it can be changed into a prime (25655503) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4527 + ... + 8473.

It is an arithmetic number, because the mean of its divisors is an integer number (1257438).

Almost surely, 2^25655500 is an apocalyptic number.

25655500 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 25655500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30178512).

25655500 is an abundant number, since it is smaller than the sum of its proper divisors (34701524).

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

25655500 is a wasteful number, since it uses less digits than its factorization.

25655500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3979 (or 3967 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 25655500 is about 5065.1258622072. The cubic root of 25655500 is about 294.9353492338.

The spelling of 25655500 in words is "twenty-five million, six hundred fifty-five thousand, five hundred".