25412444840 has 16 divisors (see below), whose sum is σ = 57178000980. Its totient is φ = 10164977920.

The previous prime is 25412444839. The next prime is 25412444891. The reversal of 25412444840 is 4844421452.

It can be written as a sum of positive squares in 2 ways, for example, as 24004544356 + 1407900484 = 154934^2 + 37522^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25412444794 and 25412444803.

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, 317655521 + ... + 317655600.

Almost surely, 2^25412444840 is an apocalyptic number.

25412444840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25412444840 is an abundant number, since it is smaller than the sum of its proper divisors (31765556140).

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

25412444840 is a wasteful number, since it uses less digits than its factorization.

25412444840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635311132 (or 635311128 counting only the distinct ones).

The product of its (nonzero) digits is 163840, while the sum is 38.

The spelling of 25412444840 in words is "twenty-five billion, four hundred twelve million, four hundred forty-four thousand, eight hundred forty".