25643365 has 8 divisors (see below), whose sum is σ = 33569568. Its totient is φ = 18649680.

The previous prime is 25643357. The next prime is 25643383. The reversal of 25643365 is 56334652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25643365 - 2³ = 25643357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25643365.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233067 + ... + 233176.

It is an arithmetic number, because the mean of its divisors is an integer number (4196196).

Almost surely, 2^25643365 is an apocalyptic number.

It is an amenable number.

25643365 is a deficient number, since it is larger than the sum of its proper divisors (7926203).

25643365 is a wasteful number, since it uses less digits than its factorization.

25643365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466259.

The product of its digits is 64800, while the sum is 34.

The square root of 25643365 is about 5063.9278233403. The cubic root of 25643365 is about 294.8888406242. Note that the first 4 decimals are identical.

It can be divided in two parts, 2564 and 3365, that added together give a square (5929 = 77²).

The spelling of 25643365 in words is "twenty-five million, six hundred forty-three thousand, three hundred sixty-five".