164849494517 has 2 divisors, whose sum is σ = 164849494518. Its totient is φ = 164849494516.

The previous prime is 164849494501. The next prime is 164849494549. The reversal of 164849494517 is 715494948461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97477581796 + 67371912721 = 312214^2 + 259561^2 .

It is an emirp because it is prime and its reverse (715494948461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164849494517 - 2⁴ = 164849494501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 164849494517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164849494597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82424747258 + 82424747259.

It is an arithmetic number, because the mean of its divisors is an integer number (82424747259).

Almost surely, 2^164849494517 is an apocalyptic number.

It is an amenable number.

164849494517 is a deficient number, since it is larger than the sum of its proper divisors (1).

164849494517 is an equidigital number, since it uses as much as digits as its factorization.

164849494517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34836480, while the sum is 62.

The spelling of 164849494517 in words is "one hundred sixty-four billion, eight hundred forty-nine million, four hundred ninety-four thousand, five hundred seventeen".