25680818408 has 16 divisors (see below), whose sum is σ = 55030325280. Its totient is φ = 11006065008.

The previous prime is 25680818393. The next prime is 25680818411. The reversal of 25680818408 is 80481808652.

It is a happy 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, 229292966 + ... + 229293077.

It is an arithmetic number, because the mean of its divisors is an integer number (3439395330).

Almost surely, 2^25680818408 is an apocalyptic number.

25680818408 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

25680818408 is an abundant number, since it is smaller than the sum of its proper divisors (29349506872).

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

25680818408 is a wasteful number, since it uses less digits than its factorization.

25680818408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458586056 (or 458586052 counting only the distinct ones).

The product of its (nonzero) digits is 983040, while the sum is 50.

The spelling of 25680818408 in words is "twenty-five billion, six hundred eighty million, eight hundred eighteen thousand, four hundred eight".