25969664 has 44 divisors (see below), whose sum is σ = 59346624. Its totient is φ = 11126784.

The previous prime is 25969663. The next prime is 25969667. The reversal of 25969664 is 46696952.

It is not an unprimeable number, because it can be changed into a prime (25969663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5357 + ... + 8979.

Almost surely, 2^25969664 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 25969664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29673312).

25969664 is an abundant number, since it is smaller than the sum of its proper divisors (33376960).

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

25969664 is an equidigital number, since it uses as much as digits as its factorization.

25969664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3650 (or 3632 counting only the distinct ones).

The product of its digits is 699840, while the sum is 47.

The square root of 25969664 is about 5096.0439558544. The cubic root of 25969664 is about 296.1343436920.

The spelling of 25969664 in words is "twenty-five million, nine hundred sixty-nine thousand, six hundred sixty-four".