265057893565 has 4 divisors (see below), whose sum is σ = 318069472284. Its totient is φ = 212046314848.

The previous prime is 265057893563. The next prime is 265057893571. The reversal of 265057893565 is 565398750562.

It is a happy number.

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 196307480356 + 68750413209 = 443066^2 + 262203^2 .

It is a cyclic number.

It is not a de Polignac number, because 265057893565 - 2¹ = 265057893563 is a prime.

It is a super-2 number, since 2×265057893565² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265057893563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26505789352 + ... + 26505789361.

It is an arithmetic number, because the mean of its divisors is an integer number (79517368071).

Almost surely, 2^265057893565 is an apocalyptic number.

It is an amenable number.

265057893565 is a deficient number, since it is larger than the sum of its proper divisors (53011578719).

265057893565 is an equidigital number, since it uses as much as digits as its factorization.

265057893565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53011578718.

The product of its (nonzero) digits is 68040000, while the sum is 61.

The spelling of 265057893565 in words is "two hundred sixty-five billion, fifty-seven million, eight hundred ninety-three thousand, five hundred sixty-five".