25645180 has 48 divisors (see below), whose sum is σ = 62215776. Its totient is φ = 8775680.

The previous prime is 25645159. The next prime is 25645187. The reversal of 25645180 is 8154652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25645187) 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, 312 + ... + 7168.

It is an arithmetic number, because the mean of its divisors is an integer number (1296162).

Almost surely, 2^25645180 is an apocalyptic number.

25645180 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 25645180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31107888).

25645180 is an abundant number, since it is smaller than the sum of its proper divisors (36570596).

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

25645180 is a wasteful number, since it uses less digits than its factorization.

25645180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6894 (or 6892 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 25645180 is about 5064.1070288848. The cubic root of 25645180 is about 294.8957977275.

It can be divided in two parts, 2564 and 5180, that added together give a square (7744 = 88²).

The spelling of 25645180 in words is "twenty-five million, six hundred forty-five thousand, one hundred eighty".