6811955805 has 16 divisors (see below), whose sum is σ = 10904416704. Its totient is φ = 3631280640.

The previous prime is 6811955803. The next prime is 6811955809. The reversal of 6811955805 is 5085591186.

It is not a de Polignac number, because 6811955805 - 2¹ = 6811955803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6811955803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77899 + ... + 140328.

It is an arithmetic number, because the mean of its divisors is an integer number (681526044).

Almost surely, 2^6811955805 is an apocalyptic number.

It is an amenable number.

6811955805 is a deficient number, since it is larger than the sum of its proper divisors (4092460899).

6811955805 is a wasteful number, since it uses less digits than its factorization.

6811955805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220316.

The product of its (nonzero) digits is 432000, while the sum is 48.

The square root of 6811955805 is about 82534.5733920034. The cubic root of 6811955805 is about 1895.6461531331.

The spelling of 6811955805 in words is "six billion, eight hundred eleven million, nine hundred fifty-five thousand, eight hundred five".