25979616 has 144 divisors (see below), whose sum is σ = 82830384. Its totient is φ = 7962624.

The previous prime is 25979599. The next prime is 25979617. The reversal of 25979616 is 61697952.

It is a happy number.

25979616 is a `hidden beast` number, since 25 + 9 + 7 + 9 + 616 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25979617) 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 23 ways as a sum of consecutive naturals, for example, 100960 + ... + 101216.

It is an arithmetic number, because the mean of its divisors is an integer number (575211).

Almost surely, 2^25979616 is an apocalyptic number.

25979616 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 25979616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41415192).

25979616 is an abundant number, since it is smaller than the sum of its proper divisors (56850768).

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

25979616 is a wasteful number, since it uses less digits than its factorization.

25979616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295 (or 275 counting only the distinct ones).

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

The square root of 25979616 is about 5097.0203060219. The cubic root of 25979616 is about 296.1721667023.

The spelling of 25979616 in words is "twenty-five million, nine hundred seventy-nine thousand, six hundred sixteen".