25865633 has 2 divisors, whose sum is σ = 25865634. Its totient is φ = 25865632.

The previous prime is 25865621. The next prime is 25865641. The reversal of 25865633 is 33656852.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14922769 + 10942864 = 3863^2 + 3308^2 .

It is a cyclic number.

It is not a de Polignac number, because 25865633 - 2⁴ = 25865617 is a prime.

It is not a weakly prime, because it can be changed into another prime (25865663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12932816 + 12932817.

It is an arithmetic number, because the mean of its divisors is an integer number (12932817).

Almost surely, 2^25865633 is an apocalyptic number.

It is an amenable number.

25865633 is a deficient number, since it is larger than the sum of its proper divisors (1).

25865633 is an equidigital number, since it uses as much as digits as its factorization.

25865633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 38.

The square root of 25865633 is about 5085.8266781321. The cubic root of 25865633 is about 295.7383896518.

The spelling of 25865633 in words is "twenty-five million, eight hundred sixty-five thousand, six hundred thirty-three".