810722163 has 18 divisors (see below), whose sum is σ = 1149477996. Its totient is φ = 508162368.

The previous prime is 810722149. The next prime is 810722183. The reversal of 810722163 is 361227018.

It is not a de Polignac number, because 810722163 - 2⁵ = 810722131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 810722163.

It is not an unprimeable number, because it can be changed into a prime (810722123) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 837906 + ... + 838872.

Almost surely, 2^810722163 is an apocalyptic number.

810722163 is a deficient number, since it is larger than the sum of its proper divisors (338755833).

810722163 is an frugal number, since it uses more digits than its factorization.

810722163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1971 (or 987 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 810722163 is about 28473.1832256248. The cubic root of 810722163 is about 932.4466976890.

The spelling of 810722163 in words is "eight hundred ten million, seven hundred twenty-two thousand, one hundred sixty-three".