25865900000 has 72 divisors (see below), whose sum is σ = 63650535480. Its totient is φ = 10346320000.

The previous prime is 25865899991. The next prime is 25865900017. The reversal of 25865900000 is 956852.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 29330 + ... + 229329.

It is an arithmetic number, because the mean of its divisors is an integer number (884035215).

Almost surely, 2^25865900000 is an apocalyptic number.

25865900000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25865900000 is an abundant number, since it is smaller than the sum of its proper divisors (37784635480).

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

25865900000 is an frugal number, since it uses more digits than its factorization.

25865900000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258694 (or 258666 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 25865900000 in words is "twenty-five billion, eight hundred sixty-five million, nine hundred thousand".