2028163565 has 4 divisors (see below), whose sum is σ = 2433796284. Its totient is φ = 1622530848.

The previous prime is 2028163549. The next prime is 2028163567. The reversal of 2028163565 is 5653618202.

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 643281769 + 1384881796 = 25363^2 + 37214^2 .

It is a cyclic number.

It is not a de Polignac number, because 2028163565 - 2⁴ = 2028163549 is a prime.

It is a super-2 number, since 2×2028163565² = 8226894892787018450, which 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 (2028163567) 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, 202816352 + ... + 202816361.

It is an arithmetic number, because the mean of its divisors is an integer number (608449071).

Almost surely, 2^2028163565 is an apocalyptic number.

It is an amenable number.

2028163565 is a deficient number, since it is larger than the sum of its proper divisors (405632719).

2028163565 is an equidigital number, since it uses as much as digits as its factorization.

2028163565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405632718.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 2028163565 is about 45035.1370043436. The cubic root of 2028163565 is about 1265.8074833273.

The spelling of 2028163565 in words is "two billion, twenty-eight million, one hundred sixty-three thousand, five hundred sixty-five".