25800800780 has 24 divisors (see below), whose sum is σ = 55646053008. Its totient is φ = 10041392448.

The previous prime is 25800800761. The next prime is 25800800783. The reversal of 25800800780 is 8700800852.

It is a super-3 number, since 3×25800800780³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (25800800783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17432234 + ... + 17433713.

It is an arithmetic number, because the mean of its divisors is an integer number (2318585542).

Almost surely, 2^25800800780 is an apocalyptic number.

25800800780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25800800780 is an abundant number, since it is smaller than the sum of its proper divisors (29845252228).

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

25800800780 is a wasteful number, since it uses less digits than its factorization.

25800800780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34865993 (or 34865991 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 38.

The spelling of 25800800780 in words is "twenty-five billion, eight hundred million, eight hundred thousand, seven hundred eighty".