25903555872 has 24 divisors (see below), whose sum is σ = 67996834416. Its totient is φ = 8634518592.

The previous prime is 25903555841. The next prime is 25903555883. The reversal of 25903555872 is 27855530952.

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134914258 + ... + 134914449.

It is an arithmetic number, because the mean of its divisors is an integer number (2833201434).

Almost surely, 2^25903555872 is an apocalyptic number.

It is an amenable number.

25903555872 is an abundant number, since it is smaller than the sum of its proper divisors (42093278544).

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

25903555872 is a wasteful number, since it uses less digits than its factorization.

25903555872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269828720 (or 269828712 counting only the distinct ones).

The product of its (nonzero) digits is 3780000, while the sum is 51.

The spelling of 25903555872 in words is "twenty-five billion, nine hundred three million, five hundred fifty-five thousand, eight hundred seventy-two".