810245165 has 4 divisors (see below), whose sum is σ = 972294204. Its totient is φ = 648196128.

The previous prime is 810245159. The next prime is 810245167. The reversal of 810245165 is 561542018.

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 201044041 + 609201124 = 14179^2 + 24682^2 .

It is a cyclic number.

It is not a de Polignac number, because 810245165 - 2¹⁴ = 810228781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (810245167) 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, 81024512 + ... + 81024521.

It is an arithmetic number, because the mean of its divisors is an integer number (243073551).

Almost surely, 2^810245165 is an apocalyptic number.

It is an amenable number.

810245165 is a deficient number, since it is larger than the sum of its proper divisors (162049039).

810245165 is a wasteful number, since it uses less digits than its factorization.

810245165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162049038.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 810245165 is about 28464.8057256676. The cubic root of 810245165 is about 932.2637897878.

The spelling of 810245165 in words is "eight hundred ten million, two hundred forty-five thousand, one hundred sixty-five".