6221987920813 has 16 divisors (see below), whose sum is σ = 7120108192000. Its totient is φ = 5326185010176.

The previous prime is 6221987920807. The next prime is 6221987920823. The reversal of 6221987920813 is 3180297891226.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6221987920813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6221987920823) 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 in 15 ways as a sum of consecutive naturals, for example, 76286731 + ... + 76368247.

It is an arithmetic number, because the mean of its divisors is an integer number (445006762000).

Almost surely, 2^{6221987920813} is an apocalyptic number.

It is an amenable number.

6221987920813 is a deficient number, since it is larger than the sum of its proper divisors (898120271187).

6221987920813 is a wasteful number, since it uses less digits than its factorization.

6221987920813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95596.

The product of its (nonzero) digits is 5225472, while the sum is 58.

The spelling of 6221987920813 in words is "six trillion, two hundred twenty-one billion, nine hundred eighty-seven million, nine hundred twenty thousand, eight hundred thirteen".