25680849 has 8 divisors (see below), whose sum is σ = 35166720. Its totient is φ = 16657776.

The previous prime is 25680841. The next prime is 25680859. The reversal of 25680849 is 94808652.

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

It is not a de Polignac number, because 25680849 - 2³ = 25680841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25680849.

It is not an unprimeable number, because it can be changed into a prime (25680841) 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, 115569 + ... + 115790.

It is an arithmetic number, because the mean of its divisors is an integer number (4395840).

Almost surely, 2^25680849 is an apocalyptic number.

It is an amenable number.

25680849 is a deficient number, since it is larger than the sum of its proper divisors (9485871).

25680849 is a wasteful number, since it uses less digits than its factorization.

25680849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231399.

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 25680849 is about 5067.6275514288. The cubic root of 25680849 is about 295.0324545353.

The spelling of 25680849 in words is "twenty-five million, six hundred eighty thousand, eight hundred forty-nine".