6721622736213 has 64 divisors (see below), whose sum is σ = 11264447969280. Its totient is φ = 3463390444800.

The previous prime is 6721622736197. The next prime is 6721622736287. The reversal of 6721622736213 is 3126372261276.

It is not a de Polignac number, because 6721622736213 - 2⁴ = 6721622736197 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6721622736113) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 62556331 + ... + 62663687.

It is an arithmetic number, because the mean of its divisors is an integer number (176006999520).

Almost surely, 2^{6721622736213} is an apocalyptic number.

It is an amenable number.

6721622736213 is a deficient number, since it is larger than the sum of its proper divisors (4542825233067).

6721622736213 is a wasteful number, since it uses less digits than its factorization.

6721622736213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109578.

The product of its digits is 1524096, while the sum is 48.

Adding to 6721622736213 its reverse (3126372261276), we get a palindrome (9847994997489).

The spelling of 6721622736213 in words is "six trillion, seven hundred twenty-one billion, six hundred twenty-two million, seven hundred thirty-six thousand, two hundred thirteen".