25616144 has 40 divisors (see below), whose sum is σ = 53855928. Its totient is φ = 11755520.

The previous prime is 25616141. The next prime is 25616147. The reversal of 25616144 is 44161652.

It is an interprime number because it is at equal distance from previous prime (25616141) and next prime (25616147).

It can be written as a sum of positive squares in 4 ways, for example, as 1488400 + 24127744 = 1220^2 + 4912^2 .

It is not an unprimeable number, because it can be changed into a prime (25616141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10004 + ... + 12300.

Almost surely, 2^25616144 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 25616144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26927964).

25616144 is an abundant number, since it is smaller than the sum of its proper divisors (28239784).

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

25616144 is a wasteful number, since it uses less digits than its factorization.

25616144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2363 (or 2357 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 25616144 is about 5061.2393739083. The cubic root of 25616144 is about 294.7844600024.

Adding to 25616144 its reverse (44161652), we get a palindrome (69777796).

The spelling of 25616144 in words is "twenty-five million, six hundred sixteen thousand, one hundred forty-four".