25645806822 has 8 divisors (see below), whose sum is σ = 51291613656. Its totient is φ = 8548602272.

The previous prime is 25645806811. The next prime is 25645806839. The reversal of 25645806822 is 22860854652.

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

25645806822 is an admirable number.

It is a congruent number.

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, 2137150563 + ... + 2137150574.

It is an arithmetic number, because the mean of its divisors is an integer number (6411451707).

Almost surely, 2^25645806822 is an apocalyptic number.

25645806822 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25645806822 is a wasteful number, since it uses less digits than its factorization.

25645806822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4274301142.

The product of its (nonzero) digits is 1843200, while the sum is 48.

The spelling of 25645806822 in words is "twenty-five billion, six hundred forty-five million, eight hundred six thousand, eight hundred twenty-two".