6623856212011 has 2 divisors, whose sum is σ = 6623856212012. Its totient is φ = 6623856212010.

The previous prime is 6623856211997. The next prime is 6623856212041. The reversal of 6623856212011 is 1102126583266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6623856212011 - 2⁵ = 6623856211979 is a prime.

It is a super-2 number, since 2×6623856212011² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6623856212041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3311928106005 + 3311928106006.

It is an arithmetic number, because the mean of its divisors is an integer number (3311928106006).

Almost surely, 2^{6623856212011} is an apocalyptic number.

6623856212011 is a deficient number, since it is larger than the sum of its proper divisors (1).

6623856212011 is an equidigital number, since it uses as much as digits as its factorization.

6623856212011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 6623856212011 in words is "six trillion, six hundred twenty-three billion, eight hundred fifty-six million, two hundred twelve thousand, eleven".