165064601789 has 2 divisors, whose sum is σ = 165064601790. Its totient is φ = 165064601788.

The previous prime is 165064601771. The next prime is 165064601861. The reversal of 165064601789 is 987106460561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164033100100 + 1031501689 = 405010^2 + 32117^2 .

It is a cyclic number.

It is not a de Polignac number, because 165064601789 - 2¹² = 165064597693 is a prime.

It is a super-2 number, since 2×165064601789² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 165064601789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165064601729) 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, 82532300894 + 82532300895.

It is an arithmetic number, because the mean of its divisors is an integer number (82532300895).

Almost surely, 2^165064601789 is an apocalyptic number.

It is an amenable number.

165064601789 is a deficient number, since it is larger than the sum of its proper divisors (1).

165064601789 is an equidigital number, since it uses as much as digits as its factorization.

165064601789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2177280, while the sum is 53.

The spelling of 165064601789 in words is "one hundred sixty-five billion, sixty-four million, six hundred one thousand, seven hundred eighty-nine".