25805700000 has 432 divisors, whose sum is σ = 93628741752. Its totient is φ = 6739200000.

The previous prime is 25805699993. The next prime is 25805700013. The reversal of 25805700000 is 750852.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 10323372816 + 15482327184 = 101604^2 + 124428^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 47699730 + ... + 47700270.

Almost surely, 2^25805700000 is an apocalyptic number.

25805700000 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 25805700000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46814370876).

25805700000 is an abundant number, since it is smaller than the sum of its proper divisors (67823041752).

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

25805700000 is an equidigital number, since it uses as much as digits as its factorization.

25805700000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635 (or 604 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The spelling of 25805700000 in words is "twenty-five billion, eight hundred five million, seven hundred thousand".