165570354643 has 2 divisors, whose sum is σ = 165570354644. Its totient is φ = 165570354642.

The previous prime is 165570354589. The next prime is 165570354683. The reversal of 165570354643 is 346453075561.

165570354643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165570354643 - 2¹⁷ = 165570223571 is a prime.

It is not a weakly prime, because it can be changed into another prime (165570354683) 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, 82785177321 + 82785177322.

It is an arithmetic number, because the mean of its divisors is an integer number (82785177322).

Almost surely, 2^165570354643 is an apocalyptic number.

165570354643 is a deficient number, since it is larger than the sum of its proper divisors (1).

165570354643 is an equidigital number, since it uses as much as digits as its factorization.

165570354643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536000, while the sum is 49.

The spelling of 165570354643 in words is "one hundred sixty-five billion, five hundred seventy million, three hundred fifty-four thousand, six hundred forty-three".