25213280850 has 144 divisors (see below), whose sum is σ = 68419728000. Its totient is φ = 6656376960.

The previous prime is 25213280849. The next prime is 25213280879. The reversal of 25213280850 is 5808231252.

25213280850 is a `hidden beast` number, since 2 + 521 + 3 + 2 + 80 + 8 + 50 = 666.

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 71 ways as a sum of consecutive naturals, for example, 35066791 + ... + 35067509.

It is an arithmetic number, because the mean of its divisors is an integer number (475137000).

Almost surely, 2^25213280850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25213280850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34209864000).

25213280850 is an abundant number, since it is smaller than the sum of its proper divisors (43206447150).

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

25213280850 is a wasteful number, since it uses less digits than its factorization.

25213280850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1409 (or 1401 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The spelling of 25213280850 in words is "twenty-five billion, two hundred thirteen million, two hundred eighty thousand, eight hundred fifty".