25855338840 has 32 divisors (see below), whose sum is σ = 77566016880. Its totient is φ = 6894756992.

The previous prime is 25855338829. The next prime is 25855338877. The reversal of 25855338840 is 4883355852.

It is a congruent number.

It is an unprimeable number.

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, 107730459 + ... + 107730698.

Almost surely, 2^25855338840 is an apocalyptic number.

25855338840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25855338840 is an abundant number, since it is smaller than the sum of its proper divisors (51710678040).

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

25855338840 is a wasteful number, since it uses less digits than its factorization.

25855338840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215461171 (or 215461167 counting only the distinct ones).

The product of its (nonzero) digits is 4608000, while the sum is 51.

The spelling of 25855338840 in words is "twenty-five billion, eight hundred fifty-five million, three hundred thirty-eight thousand, eight hundred forty".