6809720426099 has 2 divisors, whose sum is σ = 6809720426100. Its totient is φ = 6809720426098.

The previous prime is 6809720426057. The next prime is 6809720426137. The reversal of 6809720426099 is 9906240279086.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6809720426099 - 2¹² = 6809720422003 is a prime.

It is a super-2 number, since 2×6809720426099² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6809720326099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3404860213049 + 3404860213050.

It is an arithmetic number, because the mean of its divisors is an integer number (3404860213050).

Almost surely, 2^{6809720426099} is an apocalyptic number.

6809720426099 is a deficient number, since it is larger than the sum of its proper divisors (1).

6809720426099 is an equidigital number, since it uses as much as digits as its factorization.

6809720426099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23514624, while the sum is 62.

The spelling of 6809720426099 in words is "six trillion, eight hundred nine billion, seven hundred twenty million, four hundred twenty-six thousand, ninety-nine".