265057136569 has 27 divisors (see below), whose sum is σ = 282022247559. Its totient is φ = 249098734080.

The previous prime is 265057136563. The next prime is 265057136579. The reversal of 265057136569 is 965631750562.

The square root of 265057136569 is 514837.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 254777610025 + 10279526544 = 504755^2 + 101388^2 .

It is not a de Polignac number, because 265057136569 - 2⁵ = 265057136537 is a prime.

It is a super-2 number, since 2×265057136569² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265057136563) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 612140977 + ... + 612141409.

Almost surely, 2^265057136569 is an apocalyptic number.

265057136569 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

265057136569 is the 514837-th square number.

265057136569 is the 257419-th centered octagonal number.

It is an amenable number.

265057136569 is a deficient number, since it is larger than the sum of its proper divisors (16965110990).

265057136569 is an frugal number, since it uses more digits than its factorization.

265057136569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006 (or 503 counting only the distinct ones).

The product of its (nonzero) digits is 10206000, while the sum is 55.

The spelling of 265057136569 in words is "two hundred sixty-five billion, fifty-seven million, one hundred thirty-six thousand, five hundred sixty-nine".