6806745009 has 45 divisors (see below), whose sum is σ = 10384443003. Its totient is φ = 4443281568.

The previous prime is 6806744977. The next prime is 6806745017. The reversal of 6806745009 is 9005476086.

The square root of 6806745009 is 82503.

It is a perfect power (a square), and thus also a powerful number.

6806745009 is a `hidden beast` number, since 6 + 80 + 67 + 4 + 500 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1307039409 + 5499705600 = 36153^2 + 74160^2 .

It is not a de Polignac number, because 6806745009 - 2⁵ = 6806744977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6806745089) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 66084852 + ... + 66084954.

Almost surely, 2^6806745009 is an apocalyptic number.

6806745009 is the 82503-rd square number.

6806745009 is the 41252-nd centered octagonal number.

It is an amenable number.

6806745009 is a deficient number, since it is larger than the sum of its proper divisors (3577697994).

6806745009 is an frugal number, since it uses more digits than its factorization.

6806745009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The cubic root of 6806745009 is about 1895.1626725477.

The spelling of 6806745009 in words is "six billion, eight hundred six million, seven hundred forty-five thousand, nine".