25668205388 has 24 divisors (see below), whose sum is σ = 51369427200. Its totient is φ = 10993584528.

The previous prime is 25668205373. The next prime is 25668205403. The reversal of 25668205388 is 88350286652.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25668205373) and next prime (25668205403).

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, 250358 + ... + 337661.

It is an arithmetic number, because the mean of its divisors is an integer number (2140392800).

Almost surely, 2^25668205388 is an apocalyptic number.

25668205388 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

25668205388 is an abundant number, since it is smaller than the sum of its proper divisors (25701221812).

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

25668205388 is a wasteful number, since it uses less digits than its factorization.

25668205388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589589 (or 589587 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 53.

The spelling of 25668205388 in words is "twenty-five billion, six hundred sixty-eight million, two hundred five thousand, three hundred eighty-eight".