165773009461 has 2 divisors, whose sum is σ = 165773009462. Its totient is φ = 165773009460.

The previous prime is 165773009447. The next prime is 165773009527. The reversal of 165773009461 is 164900377561.

165773009461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161418329361 + 4354680100 = 401769^2 + 65990^2 .

It is a cyclic number.

It is not a de Polignac number, because 165773009461 - 2²¹ = 165770912309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165773009411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82886504730 + 82886504731.

It is an arithmetic number, because the mean of its divisors is an integer number (82886504731).

Almost surely, 2^165773009461 is an apocalyptic number.

It is an amenable number.

165773009461 is a deficient number, since it is larger than the sum of its proper divisors (1).

165773009461 is an equidigital number, since it uses as much as digits as its factorization.

165773009461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 952560, while the sum is 49.

The spelling of 165773009461 in words is "one hundred sixty-five billion, seven hundred seventy-three million, nine thousand, four hundred sixty-one".