25693641 has 12 divisors (see below), whose sum is σ = 37159668. Its totient is φ = 17107584.

The previous prime is 25693639. The next prime is 25693649. The reversal of 25693641 is 14639652.

It is a happy number.

25693641 is a `hidden beast` number, since 2 + 5 + 6 + 9 + 3 + 641 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5308416 + 20385225 = 2304^2 + 4515^2 .

It is not a de Polignac number, because 25693641 - 2¹ = 25693639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25693596 and 25693605.

It is not an unprimeable number, because it can be changed into a prime (25693649) 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, 9541 + ... + 11933.

It is an arithmetic number, because the mean of its divisors is an integer number (3096639).

Almost surely, 2^25693641 is an apocalyptic number.

It is an amenable number.

25693641 is a deficient number, since it is larger than the sum of its proper divisors (11466027).

25693641 is a wasteful number, since it uses less digits than its factorization.

25693641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3592 (or 3589 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 25693641 is about 5068.8895233572. The cubic root of 25693641 is about 295.0814330393.

The spelling of 25693641 in words is "twenty-five million, six hundred ninety-three thousand, six hundred forty-one".