165436550233 has 2 divisors, whose sum is σ = 165436550234. Its totient is φ = 165436550232.

The previous prime is 165436550143. The next prime is 165436550239. The reversal of 165436550233 is 332055634561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128975793424 + 36460756809 = 359132^2 + 190947^2 .

It is a cyclic number.

It is not a de Polignac number, because 165436550233 - 2⁹ = 165436549721 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165436550233.

It is not a weakly prime, because it can be changed into another prime (165436550239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82718275116 + 82718275117.

It is an arithmetic number, because the mean of its divisors is an integer number (82718275117).

Almost surely, 2^165436550233 is an apocalyptic number.

It is an amenable number.

165436550233 is a deficient number, since it is larger than the sum of its proper divisors (1).

165436550233 is an equidigital number, since it uses as much as digits as its factorization.

165436550233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972000, while the sum is 43.

The spelling of 165436550233 in words is "one hundred sixty-five billion, four hundred thirty-six million, five hundred fifty thousand, two hundred thirty-three".