25071616 has 26 divisors (see below), whose sum is σ = 50145302. Its totient is φ = 12533760.

The previous prime is 25071611. The next prime is 25071619. The reversal of 25071616 is 61617052.

It can be written as a sum of positive squares in only one way, i.e., 16777216 + 8294400 = 4096^2 + 2880^2 .

It is not an unprimeable number, because it can be changed into a prime (25071611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1036 + ... + 7156.

Almost surely, 2^25071616 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 25071616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25072651).

25071616 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25071616 is an frugal number, since it uses more digits than its factorization.

25071616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6145 (or 6123 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 25071616 is about 5007.1564784816. The cubic root of 25071616 is about 292.6807162399.

Adding to 25071616 its reverse (61617052), we get a palindrome (86688668).

The spelling of 25071616 in words is "twenty-five million, seventy-one thousand, six hundred sixteen".