25189838040 has 64 divisors (see below), whose sum is σ = 76146428160. Its totient is φ = 6666008960.

The previous prime is 25189838033. The next prime is 25189838059. The reversal of 25189838040 is 4083898152.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 785484 + ... + 816923.

It is an arithmetic number, because the mean of its divisors is an integer number (1189787940).

Almost surely, 2^25189838040 is an apocalyptic number.

25189838040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25189838040 is an abundant number, since it is smaller than the sum of its proper divisors (50956590120).

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

25189838040 is a wasteful number, since it uses less digits than its factorization.

25189838040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1602552 (or 1602548 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 48.

The spelling of 25189838040 in words is "twenty-five billion, one hundred eighty-nine million, eight hundred thirty-eight thousand, forty".