6721622736113 has 2 divisors, whose sum is σ = 6721622736114. Its totient is φ = 6721622736112.

The previous prime is 6721622736109. The next prime is 6721622736161. The reversal of 6721622736113 is 3116372261276.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6455374992049 + 266247744064 = 2540743^2 + 515992^2 .

It is a cyclic number.

It is not a de Polignac number, because 6721622736113 - 2² = 6721622736109 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6721622736313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3360811368056 + 3360811368057.

It is an arithmetic number, because the mean of its divisors is an integer number (3360811368057).

Almost surely, 2^{6721622736113} is an apocalyptic number.

It is an amenable number.

6721622736113 is a deficient number, since it is larger than the sum of its proper divisors (1).

6721622736113 is an equidigital number, since it uses as much as digits as its factorization.

6721622736113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 47.

Adding to 6721622736113 its reverse (3116372261276), we get a palindrome (9837994997389).

The spelling of 6721622736113 in words is "six trillion, seven hundred twenty-one billion, six hundred twenty-two million, seven hundred thirty-six thousand, one hundred thirteen".