2565465653 has 4 divisors (see below), whose sum is σ = 2628038028. Its totient is φ = 2502893280.

The previous prime is 2565465647. The next prime is 2565465713. The reversal of 2565465653 is 3565645652.

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 1229343844 + 1336121809 = 35062^2 + 36553^2 .

It is a cyclic number.

It is not a de Polignac number, because 2565465653 - 2²⁰ = 2564417077 is a prime.

It is a super-2 number, since 2×2565465653² = 13163228033445432818, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2565465598 and 2565465607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2565365653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31286126 + ... + 31286207.

It is an arithmetic number, because the mean of its divisors is an integer number (657009507).

Almost surely, 2^2565465653 is an apocalyptic number.

It is an amenable number.

2565465653 is a deficient number, since it is larger than the sum of its proper divisors (62572375).

2565465653 is an equidigital number, since it uses as much as digits as its factorization.

2565465653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62572374.

The product of its digits is 3240000, while the sum is 47.

The square root of 2565465653 is about 50650.4259903113. The cubic root of 2565465653 is about 1368.9536210542.

The spelling of 2565465653 in words is "two billion, five hundred sixty-five million, four hundred sixty-five thousand, six hundred fifty-three".