25680361 has 12 divisors (see below), whose sum is σ = 30174660. Its totient is φ = 21789600.

The previous prime is 25680337. The next prime is 25680367. The reversal of 25680361 is 16308652.

It can be written as a sum of positive squares in 2 ways, for example, as 22857961 + 2822400 = 4781^2 + 1680^2 .

It is not a de Polignac number, because 25680361 - 2⁷ = 25680233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25680367) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2355 + ... + 7543.

It is an arithmetic number, because the mean of its divisors is an integer number (2514555).

Almost surely, 2^25680361 is an apocalyptic number.

It is an amenable number.

25680361 is a deficient number, since it is larger than the sum of its proper divisors (4494299).

25680361 is a wasteful number, since it uses less digits than its factorization.

25680361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5304 (or 5297 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 25680361 is about 5067.5794024366. The cubic root of 25680361 is about 295.0305857400.

The spelling of 25680361 in words is "twenty-five million, six hundred eighty thousand, three hundred sixty-one".