25328589990 has 192 divisors, whose sum is σ = 70454845440. Its totient is φ = 5814547200.

The previous prime is 25328589971. The next prime is 25328589997. The reversal of 25328589990 is 9998582352.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25328589997) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5286516 + ... + 5291304.

It is an arithmetic number, because the mean of its divisors is an integer number (366952320).

Almost surely, 2^25328589990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25328589990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35227422720).

25328589990 is an abundant number, since it is smaller than the sum of its proper divisors (45126255450).

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

25328589990 is a wasteful number, since it uses less digits than its factorization.

25328589990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4899 (or 4888 counting only the distinct ones).

The product of its (nonzero) digits is 13996800, while the sum is 60.

The spelling of 25328589990 in words is "twenty-five billion, three hundred twenty-eight million, five hundred eighty-nine thousand, nine hundred ninety".