25668597808 has 40 divisors (see below), whose sum is σ = 59829067520. Its totient is φ = 10421835840.

The previous prime is 25668597781. The next prime is 25668597821. The reversal of 25668597808 is 80879586652.

It is a self number, because there is not a number n which added to its sum of digits gives 25668597808.

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, 6029028 + ... + 6033283.

It is an arithmetic number, because the mean of its divisors is an integer number (1495726688).

Almost surely, 2^25668597808 is an apocalyptic number.

25668597808 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

25668597808 is an abundant number, since it is smaller than the sum of its proper divisors (34160469712).

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

25668597808 is a wasteful number, since it uses less digits than its factorization.

25668597808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12062345 (or 12062339 counting only the distinct ones).

The product of its (nonzero) digits is 58060800, while the sum is 64.

The spelling of 25668597808 in words is "twenty-five billion, six hundred sixty-eight million, five hundred ninety-seven thousand, eight hundred eight".