810443745 has 32 divisors (see below), whose sum is σ = 1479738240. Its totient is φ = 420552000.

The previous prime is 810443731. The next prime is 810443749. The reversal of 810443745 is 547344018.

It is not a de Polignac number, because 810443745 - 2⁵ = 810443713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (810443749) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76131 + ... + 86120.

It is an arithmetic number, because the mean of its divisors is an integer number (46241820).

Almost surely, 2^810443745 is an apocalyptic number.

It is an amenable number.

810443745 is a deficient number, since it is larger than the sum of its proper divisors (669294495).

810443745 is a wasteful number, since it uses less digits than its factorization.

810443745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162302 (or 162296 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 810443745 is about 28468.2936791090. The cubic root of 810443745 is about 932.3399452648.

The spelling of 810443745 in words is "eight hundred ten million, four hundred forty-three thousand, seven hundred forty-five".