25812810880 has 64 divisors (see below), whose sum is σ = 65338705080. Its totient is φ = 9717760000.

The previous prime is 25812810853. The next prime is 25812810893. The reversal of 25812810880 is 8801821852.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 22329922624 + 3482888256 = 149432^2 + 59016^2 .

It is a tau number, because it is divible by the number of its divisors (64).

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, 1175371 + ... + 1197130.

Almost surely, 2^25812810880 is an apocalyptic number.

25812810880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25812810880 is an abundant number, since it is smaller than the sum of its proper divisors (39525894200).

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

25812810880 is a wasteful number, since it uses less digits than its factorization.

25812810880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2372537 (or 2372525 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 43.

The spelling of 25812810880 in words is "twenty-five billion, eight hundred twelve million, eight hundred ten thousand, eight hundred eighty".