265561144 has 16 divisors (see below), whose sum is σ = 498251520. Its totient is φ = 132694080.

The previous prime is 265561117. The next prime is 265561147. The reversal of 265561144 is 441165562.

265561144 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265561147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3324 + ... + 23284.

It is an arithmetic number, because the mean of its divisors is an integer number (31140720).

Almost surely, 2^265561144 is an apocalyptic number.

It is an amenable number.

265561144 is a deficient number, since it is larger than the sum of its proper divisors (232690376).

265561144 is a wasteful number, since it uses less digits than its factorization.

265561144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21630 (or 21626 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The square root of 265561144 is about 16296.0468826032. The cubic root of 265561144 is about 642.7688823967.

The spelling of 265561144 in words is "two hundred sixty-five million, five hundred sixty-one thousand, one hundred forty-four".