25537668 has 48 divisors (see below), whose sum is σ = 64727040. Its totient is φ = 7789824.

The previous prime is 25537651. The next prime is 25537693. The reversal of 25537668 is 86673552.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19168 + ... + 20456.

It is an arithmetic number, because the mean of its divisors is an integer number (1348480).

Almost surely, 2^25537668 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 25537668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32363520).

25537668 is an abundant number, since it is smaller than the sum of its proper divisors (39189372).

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

25537668 is a wasteful number, since it uses less digits than its factorization.

25537668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436 (or 1434 counting only the distinct ones).

The product of its digits is 302400, while the sum is 42.

The square root of 25537668 is about 5053.4807806105. The cubic root of 25537668 is about 294.4831243939.

The spelling of 25537668 in words is "twenty-five million, five hundred thirty-seven thousand, six hundred sixty-eight".