6217991011 has 2 divisors, whose sum is σ = 6217991012. Its totient is φ = 6217991010.

The previous prime is 6217990979. The next prime is 6217991041. The reversal of 6217991011 is 1101997126.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6217991011 - 2⁵ = 6217990979 is a prime.

It is not a weakly prime, because it can be changed into another prime (6217991041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3108995505 + 3108995506.

It is an arithmetic number, because the mean of its divisors is an integer number (3108995506).

Almost surely, 2^6217991011 is an apocalyptic number.

6217991011 is a deficient number, since it is larger than the sum of its proper divisors (1).

6217991011 is an equidigital number, since it uses as much as digits as its factorization.

6217991011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 37.

The square root of 6217991011 is about 78854.2390173160. The cubic root of 6217991011 is about 1838.8657757536.

The spelling of 6217991011 in words is "six billion, two hundred seventeen million, nine hundred ninety-one thousand, eleven".