806564644 has 12 divisors (see below), whose sum is σ = 1472857344. Its totient is φ = 385748264.

The previous prime is 806564593. The next prime is 806564651. The reversal of 806564644 is 446465608.

It is a self number, because there is not a number n which added to its sum of digits gives 806564644.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4383412 + ... + 4383595.

It is an arithmetic number, because the mean of its divisors is an integer number (122738112).

Almost surely, 2^806564644 is an apocalyptic number.

It is an amenable number.

806564644 is a deficient number, since it is larger than the sum of its proper divisors (666292700).

806564644 is a wasteful number, since it uses less digits than its factorization.

806564644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8767034 (or 8767032 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 43.

The square root of 806564644 is about 28400.0817604457. The cubic root of 806564644 is about 930.8500510151.

The spelling of 806564644 in words is "eight hundred six million, five hundred sixty-four thousand, six hundred forty-four".