25989242850 has 120 divisors (see below), whose sum is σ = 72433490448. Its totient is φ = 6909170400.

The previous prime is 25989242843. The next prime is 25989242899. The reversal of 25989242850 is 5824298952.

It is a happy number.

25989242850 is a `hidden beast` number, since 2 + 598 + 9 + 2 + 42 + 8 + 5 + 0 = 666.

It is a super-2 number, since 2×25989242850² (a number of 22 digits) contains 22 as substring.

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

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 59 ways as a sum of consecutive naturals, for example, 1330857 + ... + 1350243.

Almost surely, 2^25989242850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25989242850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36216745224).

25989242850 is an abundant number, since it is smaller than the sum of its proper divisors (46444247598).

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

25989242850 is a wasteful number, since it uses less digits than its factorization.

25989242850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19742 (or 19728 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 54.

The spelling of 25989242850 in words is "twenty-five billion, nine hundred eighty-nine million, two hundred forty-two thousand, eight hundred fifty".