164618549968517 has 2 divisors, whose sum is σ = 164618549968518. Its totient is φ = 164618549968516.

The previous prime is 164618549968501. The next prime is 164618549968591. The reversal of 164618549968517 is 715869945816461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161116539262561 + 3502010705956 = 12693169^2 + 1871366^2 .

It is a cyclic number.

It is not a de Polignac number, because 164618549968517 - 2⁴ = 164618549968501 is a prime.

It is a super-3 number, since 3×164618549968517³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164618549968417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82309274984258 + 82309274984259.

It is an arithmetic number, because the mean of its divisors is an integer number (82309274984259).

Almost surely, 2^{164618549968517} is an apocalyptic number.

It is an amenable number.

164618549968517 is a deficient number, since it is larger than the sum of its proper divisors (1).

164618549968517 is an equidigital number, since it uses as much as digits as its factorization.

164618549968517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3135283200, while the sum is 80.

The spelling of 164618549968517 in words is "one hundred sixty-four trillion, six hundred eighteen billion, five hundred forty-nine million, nine hundred sixty-eight thousand, five hundred seventeen".