810245505 has 16 divisors (see below), whose sum is σ = 1308288960. Its totient is φ = 428165568.

The previous prime is 810245497. The next prime is 810245507. The reversal of 810245505 is 505542018.

It is not a de Polignac number, because 810245505 - 2³ = 810245497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (810245507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246147 + ... + 249416.

It is an arithmetic number, because the mean of its divisors is an integer number (81768060).

Almost surely, 2^810245505 is an apocalyptic number.

It is an amenable number.

810245505 is a deficient number, since it is larger than the sum of its proper divisors (498043455).

810245505 is a wasteful number, since it uses less digits than its factorization.

810245505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495680.

The product of its (nonzero) digits is 8000, while the sum is 30.

The square root of 810245505 is about 28464.8116979544. The cubic root of 810245505 is about 932.2639201885.

The spelling of 810245505 in words is "eight hundred ten million, two hundred forty-five thousand, five hundred five".