25872221850 has 24 divisors (see below), whose sum is σ = 64163110560. Its totient is φ = 6899259120.

The previous prime is 25872221839. The next prime is 25872221863. The reversal of 25872221850 is 5812227852.

It is a Curzon number.

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, 86240590 + ... + 86240889.

It is an arithmetic number, because the mean of its divisors is an integer number (2673462940).

Almost surely, 2^25872221850 is an apocalyptic number.

25872221850 is an abundant number, since it is smaller than the sum of its proper divisors (38290888710).

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

25872221850 is a wasteful number, since it uses less digits than its factorization.

25872221850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172481494 (or 172481489 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 42.

The spelling of 25872221850 in words is "twenty-five billion, eight hundred seventy-two million, two hundred twenty-one thousand, eight hundred fifty".