265509080 has 16 divisors (see below), whose sum is σ = 597395520. Its totient is φ = 106203616.

The previous prime is 265509073. The next prime is 265509091. The reversal of 265509080 is 80905562.

It is a self number, because there is not a number n which added to its sum of digits gives 265509080.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3318824 + ... + 3318903.

It is an arithmetic number, because the mean of its divisors is an integer number (37337220).

Almost surely, 2^265509080 is an apocalyptic number.

265509080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265509080 is an abundant number, since it is smaller than the sum of its proper divisors (331886440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

265509080 is a wasteful number, since it uses less digits than its factorization.

265509080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6637738 (or 6637734 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 265509080 is about 16294.4493616691. The cubic root of 265509080 is about 642.7268741097.

The spelling of 265509080 in words is "two hundred sixty-five million, five hundred nine thousand, eighty".