25780489344 has 96 divisors (see below), whose sum is σ = 74575088640. Its totient is φ = 8548431360.

The previous prime is 25780489327. The next prime is 25780489387. The reversal of 25780489344 is 44398408752.

25780489344 is a `hidden beast` number, since 2 + 57 + 80 + 489 + 34 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 161449 + ... + 278615.

It is an arithmetic number, because the mean of its divisors is an integer number (776823840).

Almost surely, 2^25780489344 is an apocalyptic number.

25780489344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25780489344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37287544320).

25780489344 is an abundant number, since it is smaller than the sum of its proper divisors (48794599296).

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

25780489344 is a wasteful number, since it uses less digits than its factorization.

25780489344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117378 (or 117363 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 54.

The spelling of 25780489344 in words is "twenty-five billion, seven hundred eighty million, four hundred eighty-nine thousand, three hundred forty-four".