25861516 has 12 divisors (see below), whose sum is σ = 45405360. Its totient is φ = 12888560.

The previous prime is 25861513. The next prime is 25861523. The reversal of 25861516 is 61516852.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (25861513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9151 + ... + 11638.

It is an arithmetic number, because the mean of its divisors is an integer number (3783780).

Almost surely, 2^25861516 is an apocalyptic number.

It is an amenable number.

25861516 is a deficient number, since it is larger than the sum of its proper divisors (19543844).

25861516 is a wasteful number, since it uses less digits than its factorization.

25861516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21104 (or 21102 counting only the distinct ones).

The product of its digits is 14400, while the sum is 34.

The square root of 25861516 is about 5085.4219097337. The cubic root of 25861516 is about 295.7226980511.

The spelling of 25861516 in words is "twenty-five million, eight hundred sixty-one thousand, five hundred sixteen".