25681416 has 32 divisors (see below), whose sum is σ = 65772000. Its totient is φ = 8351360.

The previous prime is 25681393. The next prime is 25681451. The reversal of 25681416 is 61418652.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12066 + ... + 14033.

It is an arithmetic number, because the mean of its divisors is an integer number (2055375).

Almost surely, 2^25681416 is an apocalyptic number.

It is an amenable number.

25681416 is an abundant number, since it is smaller than the sum of its proper divisors (40090584).

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

25681416 is a wasteful number, since it uses less digits than its factorization.

25681416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26149 (or 26145 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 25681416 is about 5067.6834944578. The cubic root of 25681416 is about 295.0346258312.

The spelling of 25681416 in words is "twenty-five million, six hundred eighty-one thousand, four hundred sixteen".