165213014520493 has 2 divisors, whose sum is σ = 165213014520494. Its totient is φ = 165213014520492.

The previous prime is 165213014520479. The next prime is 165213014520557. The reversal of 165213014520493 is 394025410312561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97645979033604 + 67567035486889 = 9881598^2 + 8219917^2 .

It is a cyclic number.

It is not a de Polignac number, because 165213014520493 - 2¹⁷ = 165213014389421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165213014520413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82606507260246 + 82606507260247.

It is an arithmetic number, because the mean of its divisors is an integer number (82606507260247).

Almost surely, 2^{165213014520493} is an apocalyptic number.

It is an amenable number.

165213014520493 is a deficient number, since it is larger than the sum of its proper divisors (1).

165213014520493 is an equidigital number, since it uses as much as digits as its factorization.

165213014520493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 777600, while the sum is 46.

The spelling of 165213014520493 in words is "one hundred sixty-five trillion, two hundred thirteen billion, fourteen million, five hundred twenty thousand, four hundred ninety-three".