6211555537979 has 16 divisors (see below), whose sum is σ = 6956124873984. Its totient is φ = 5497811138400.

The previous prime is 6211555537973. The next prime is 6211555538009. The reversal of 6211555537979 is 9797355551126.

It is a cyclic number.

It is not a de Polignac number, because 6211555537979 - 2⁸ = 6211555537723 is a prime.

It is a super-2 number, since 2×6211555537979² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6211555537973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20965844 + ... + 21260049.

It is an arithmetic number, because the mean of its divisors is an integer number (434757804624).

Almost surely, 2^{6211555537979} is an apocalyptic number.

6211555537979 is a deficient number, since it is larger than the sum of its proper divisors (744569336005).

6211555537979 is a wasteful number, since it uses less digits than its factorization.

6211555537979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42226258.

The product of its digits is 89302500, while the sum is 65.

The spelling of 6211555537979 in words is "six trillion, two hundred eleven billion, five hundred fifty-five million, five hundred thirty-seven thousand, nine hundred seventy-nine".