25545864 has 16 divisors (see below), whose sum is σ = 63864720. Its totient is φ = 8515280.

The previous prime is 25545853. The next prime is 25545881. The reversal of 25545864 is 46854552.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 532182 + ... + 532229.

It is an arithmetic number, because the mean of its divisors is an integer number (3991545).

Almost surely, 2^25545864 is an apocalyptic number.

25545864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25545864 is an abundant number, since it is smaller than the sum of its proper divisors (38318856).

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

25545864 is a wasteful number, since it uses less digits than its factorization.

25545864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064420 (or 1064416 counting only the distinct ones).

The product of its digits is 192000, while the sum is 39.

The square root of 25545864 is about 5054.2916417635. The cubic root of 25545864 is about 294.5146246015.

The spelling of 25545864 in words is "twenty-five million, five hundred forty-five thousand, eight hundred sixty-four".