25821596260 has 24 divisors (see below), whose sum is σ = 55690903800. Its totient is φ = 10049485824.

The previous prime is 25821596249. The next prime is 25821596261. The reversal of 25821596260 is 6269512852.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10200596004 + 15621000256 = 100998^2 + 124984^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25821596260.

It is not an unprimeable number, because it can be changed into a prime (25821596261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17446285 + ... + 17447764.

It is an arithmetic number, because the mean of its divisors is an integer number (2320454325).

Almost surely, 2^25821596260 is an apocalyptic number.

25821596260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25821596260 is an abundant number, since it is smaller than the sum of its proper divisors (29869307540).

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

25821596260 is a wasteful number, since it uses less digits than its factorization.

25821596260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34894095 (or 34894093 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 46.

The spelling of 25821596260 in words is "twenty-five billion, eight hundred twenty-one million, five hundred ninety-six thousand, two hundred sixty".