25617616 has 40 divisors (see below), whose sum is σ = 51572840. Its totient is φ = 12317184.

The previous prime is 25617611. The next prime is 25617649. The reversal of 25617616 is 61671652.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13395600 + 12222016 = 3660^2 + 3496^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25617611) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 64330 + ... + 64726.

It is an arithmetic number, because the mean of its divisors is an integer number (1289321).

Almost surely, 2^25617616 is an apocalyptic number.

It is an amenable number.

25617616 is an abundant number, since it is smaller than the sum of its proper divisors (25955224).

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

25617616 is a wasteful number, since it uses less digits than its factorization.

25617616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551 (or 545 counting only the distinct ones).

The product of its digits is 15120, while the sum is 34.

The square root of 25617616 is about 5061.3847907465. The cubic root of 25617616 is about 294.7901063690.

The spelling of 25617616 in words is "twenty-five million, six hundred seventeen thousand, six hundred sixteen".