25663898250 has 256 divisors, whose sum is σ = 73153866240. Its totient is φ = 6739459200.

The previous prime is 25663898237. The next prime is 25663898251. The reversal of 25663898250 is 5289836652.

25663898250 is a `hidden beast` number, since 2 + 5 + 6 + 6 + 389 + 8 + 250 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (25663898251) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 39912429 + ... + 39913071.

It is an arithmetic number, because the mean of its divisors is an integer number (285757290).

Almost surely, 2^25663898250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25663898250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36576933120).

25663898250 is an abundant number, since it is smaller than the sum of its proper divisors (47489967990).

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

25663898250 is an frugal number, since it uses more digits than its factorization.

25663898250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754 (or 726 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 54.

The spelling of 25663898250 in words is "twenty-five billion, six hundred sixty-three million, eight hundred ninety-eight thousand, two hundred fifty".