25699716 has 108 divisors (see below), whose sum is σ = 80108028. Its totient is φ = 6902784.

The previous prime is 25699691. The next prime is 25699757. The reversal of 25699716 is 61799652.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 22127616 + 3572100 = 4704^2 + 1890^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 29560 + ... + 30416.

It is an arithmetic number, because the mean of its divisors is an integer number (741741).

Almost surely, 2^25699716 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25699716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40054014).

25699716 is an abundant number, since it is smaller than the sum of its proper divisors (54408312).

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

25699716 is a wasteful number, since it uses less digits than its factorization.

25699716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898 (or 886 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 25699716 is about 5069.4887316178. The cubic root of 25699716 is about 295.1046875408.

The spelling of 25699716 in words is "twenty-five million, six hundred ninety-nine thousand, seven hundred sixteen".