6161986854217 has 2 divisors, whose sum is σ = 6161986854218. Its totient is φ = 6161986854216.

The previous prime is 6161986854169. The next prime is 6161986854313. The reversal of 6161986854217 is 7124586891616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3591419170816 + 2570567683401 = 1895104^2 + 1603299^2 .

It is a cyclic number.

It is not a de Polignac number, because 6161986854217 - 2¹⁹ = 6161986329929 is a prime.

It is a super-2 number, since 2×6161986854217² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6161986854817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3080993427108 + 3080993427109.

It is an arithmetic number, because the mean of its divisors is an integer number (3080993427109).

Almost surely, 2^{6161986854217} is an apocalyptic number.

It is an amenable number.

6161986854217 is a deficient number, since it is larger than the sum of its proper divisors (1).

6161986854217 is an equidigital number, since it uses as much as digits as its factorization.

6161986854217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34836480, while the sum is 64.

The spelling of 6161986854217 in words is "six trillion, one hundred sixty-one billion, nine hundred eighty-six million, eight hundred fifty-four thousand, two hundred seventeen".