25565653 has 2 divisors, whose sum is σ = 25565654. Its totient is φ = 25565652.

The previous prime is 25565651. The next prime is 25565689. The reversal of 25565653 is 35656552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23261329 + 2304324 = 4823^2 + 1518^2 .

It is a cyclic number.

It is not a de Polignac number, because 25565653 - 2¹ = 25565651 is a prime.

It is a super-2 number, since 2×25565653² = 1307205226632818, which contains 22 as substring.

Together with 25565651, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25565651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12782826 + 12782827.

It is an arithmetic number, because the mean of its divisors is an integer number (12782827).

Almost surely, 2^25565653 is an apocalyptic number.

It is an amenable number.

25565653 is a deficient number, since it is larger than the sum of its proper divisors (1).

25565653 is an equidigital number, since it uses as much as digits as its factorization.

25565653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 135000, while the sum is 37.

The square root of 25565653 is about 5056.2489060567. The cubic root of 25565653 is about 294.5906531599.

It can be divided in two parts, 2 and 5565653, that added together give a palindrome (5565655).

The spelling of 25565653 in words is "twenty-five million, five hundred sixty-five thousand, six hundred fifty-three".