25627681 has 8 divisors (see below), whose sum is σ = 26801280. Its totient is φ = 24459072.

The previous prime is 25627649. The next prime is 25627729. The reversal of 25627681 is 18672652.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25627681 - 2⁵ = 25627649 is a prime.

It is a super-2 number, since 2×25627681² = 1313556066875522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25627681.

It is not an unprimeable number, because it can be changed into a prime (25627621) 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, 12700 + ... + 14578.

It is an arithmetic number, because the mean of its divisors is an integer number (3350160).

Almost surely, 2^25627681 is an apocalyptic number.

It is an amenable number.

25627681 is a deficient number, since it is larger than the sum of its proper divisors (1173599).

25627681 is a wasteful number, since it uses less digits than its factorization.

25627681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2495.

The product of its digits is 40320, while the sum is 37.

The square root of 25627681 is about 5062.3789862080. The cubic root of 25627681 is about 294.8287083727.

The spelling of 25627681 in words is "twenty-five million, six hundred twenty-seven thousand, six hundred eighty-one".