6809456681 has 4 divisors (see below), whose sum is σ = 6811899264. Its totient is φ = 6807014100.

The previous prime is 6809456671. The next prime is 6809456723. The reversal of 6809456681 is 1866549086.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1866549086 = 2 ⋅933274543.

It is a cyclic number.

It is not a de Polignac number, because 6809456681 - 2⁶ = 6809456617 is a prime.

It is a super-2 number, since 2×6809456681² = 92737400580831071522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6809456671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1217105 + ... + 1222686.

It is an arithmetic number, because the mean of its divisors is an integer number (1702974816).

Almost surely, 2^6809456681 is an apocalyptic number.

It is an amenable number.

6809456681 is a deficient number, since it is larger than the sum of its proper divisors (2442583).

6809456681 is a wasteful number, since it uses less digits than its factorization.

6809456681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2442582.

The product of its (nonzero) digits is 2488320, while the sum is 53.

The square root of 6809456681 is about 82519.4321417689. The cubic root of 6809456681 is about 1895.4143041899.

The spelling of 6809456681 in words is "six billion, eight hundred nine million, four hundred fifty-six thousand, six hundred eighty-one".