25805380000 has 120 divisors (see below), whose sum is σ = 63597042432. Its totient is φ = 10303968000.

The previous prime is 25805379997. The next prime is 25805380001. The reversal of 25805380000 is 8350852.

It is not an unprimeable number, because it can be changed into a prime (25805380001) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 21739407 + ... + 21740593.

Almost surely, 2^25805380000 is an apocalyptic number.

25805380000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25805380000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31798521216).

25805380000 is an abundant number, since it is smaller than the sum of its proper divisors (37791662432).

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

25805380000 is a wasteful number, since it uses less digits than its factorization.

25805380000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2304 (or 2281 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The spelling of 25805380000 in words is "twenty-five billion, eight hundred five million, three hundred eighty thousand".