25259984660 has 12 divisors (see below), whose sum is σ = 53045967828. Its totient is φ = 10103993856.

The previous prime is 25259984621. The next prime is 25259984677. The reversal of 25259984660 is 6648995252.

It can be written as a sum of positive squares in 2 ways, for example, as 13338402064 + 11921582596 = 115492^2 + 109186^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25259984596 and 25259984605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 631499597 + ... + 631499636.

It is an arithmetic number, because the mean of its divisors is an integer number (4420497319).

Almost surely, 2^25259984660 is an apocalyptic number.

25259984660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25259984660 is an abundant number, since it is smaller than the sum of its proper divisors (27785983168).

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

25259984660 is a wasteful number, since it uses less digits than its factorization.

25259984660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262999242 (or 1262999240 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 56.

The spelling of 25259984660 in words is "twenty-five billion, two hundred fifty-nine million, nine hundred eighty-four thousand, six hundred sixty".