25043616 has 72 divisors (see below), whose sum is σ = 76707540. Its totient is φ = 7704576.

The previous prime is 25043609. The next prime is 25043639. The reversal of 25043616 is 61634052.

25043616 is a `hidden beast` number, since 2 + 5 + 0 + 43 + 616 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 25040016 + 3600 = 5004^2 + 60^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a self number, because there is not a number n which added to its sum of digits gives 25043616.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 400 + ... + 7088.

Almost surely, 2^25043616 is an apocalyptic number.

25043616 is a gapful number since it is divisible by the number (26) 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 25043616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38353770).

25043616 is an abundant number, since it is smaller than the sum of its proper divisors (51663924).

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

25043616 is a wasteful number, since it uses less digits than its factorization.

25043616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6718 (or 6707 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 25043616 is about 5004.3596993022. The cubic root of 25043616 is about 292.5717203047.

Adding to 25043616 its reverse (61634052), we get a palindrome (86677668).

The spelling of 25043616 in words is "twenty-five million, forty-three thousand, six hundred sixteen".