25780082808 has 16 divisors (see below), whose sum is σ = 64450207080. Its totient is φ = 8593360928.

The previous prime is 25780082767. The next prime is 25780082843. The reversal of 25780082808 is 80828008752.

It is a happy number.

It is a super-2 number, since 2×25780082808² (a number of 22 digits) contains 22 as substring.

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, 537085035 + ... + 537085082.

Almost surely, 2^25780082808 is an apocalyptic number.

It is an amenable number.

25780082808 is an abundant number, since it is smaller than the sum of its proper divisors (38670124272).

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

25780082808 is a wasteful number, since it uses less digits than its factorization.

25780082808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074170126 (or 1074170122 counting only the distinct ones).

The product of its (nonzero) digits is 573440, while the sum is 48.

The spelling of 25780082808 in words is "twenty-five billion, seven hundred eighty million, eighty-two thousand, eight hundred eight".