25800516 has 72 divisors (see below), whose sum is σ = 76300224. Its totient is φ = 7197120.

The previous prime is 25800497. The next prime is 25800547. The reversal of 25800516 is 61500852.

It is a self number, because there is not a number n which added to its sum of digits gives 25800516.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9646 + ... + 12026.

Almost surely, 2^25800516 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 25800516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38150112).

25800516 is an abundant number, since it is smaller than the sum of its proper divisors (50499708).

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

25800516 is a wasteful number, since it uses less digits than its factorization.

25800516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441 (or 2436 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 25800516 is about 5079.4208331265. The cubic root of 25800516 is about 295.4900062756.

The spelling of 25800516 in words is "twenty-five million, eight hundred thousand, five hundred sixteen".