810645916 has 24 divisors (see below), whose sum is σ = 1434208160. Its totient is φ = 400896000.

The previous prime is 810645907. The next prime is 810645917. The reversal of 810645916 is 619546018.

It is a super-2 number, since 2×810645916² = 1314293602254958112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (810645917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142780 + ... + 148348.

Almost surely, 2^810645916 is an apocalyptic number.

It is an amenable number.

810645916 is a deficient number, since it is larger than the sum of its proper divisors (623562244).

810645916 is a wasteful number, since it uses less digits than its factorization.

810645916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5965 (or 5963 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 810645916 is about 28471.8442676269. The cubic root of 810645916 is about 932.4174651128.

The spelling of 810645916 in words is "eight hundred ten million, six hundred forty-five thousand, nine hundred sixteen".