25765765 has 4 divisors (see below), whose sum is σ = 30918924. Its totient is φ = 20612608.

The previous prime is 25765763. The next prime is 25765777. The reversal of 25765765 is 56756752.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13417569 + 12348196 = 3663^2 + 3514^2 .

It is a cyclic number.

It is not a de Polignac number, because 25765765 - 2¹ = 25765763 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25765763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2576572 + ... + 2576581.

It is an arithmetic number, because the mean of its divisors is an integer number (7729731).

Almost surely, 2^25765765 is an apocalyptic number.

It is an amenable number.

25765765 is a deficient number, since it is larger than the sum of its proper divisors (5153159).

25765765 is an equidigital number, since it uses as much as digits as its factorization.

25765765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5153158.

The product of its digits is 441000, while the sum is 43.

The square root of 25765765 is about 5075.9989164695. The cubic root of 25765765 is about 295.3572804166.

The spelling of 25765765 in words is "twenty-five million, seven hundred sixty-five thousand, seven hundred sixty-five".