165046448393 has 4 divisors (see below), whose sum is σ = 165058501380. Its totient is φ = 165034395408.

The previous prime is 165046448317. The next prime is 165046448423. The reversal of 165046448393 is 393844640561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 393844640561 = 1091 ⋅360994171.

It can be written as a sum of positive squares in 2 ways, for example, as 123363917824 + 41682530569 = 351232^2 + 204163^2 .

It is a cyclic number.

It is not a de Polignac number, because 165046448393 - 2⁸ = 165046448137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (165046448293) 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 in 3 ways as a sum of consecutive naturals, for example, 6005930 + ... + 6033347.

It is an arithmetic number, because the mean of its divisors is an integer number (41264625345).

Almost surely, 2^165046448393 is an apocalyptic number.

It is an amenable number.

165046448393 is a deficient number, since it is larger than the sum of its proper divisors (12052987).

165046448393 is a wasteful number, since it uses less digits than its factorization.

165046448393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12052986.

The product of its (nonzero) digits is 7464960, while the sum is 53.

The spelling of 165046448393 in words is "one hundred sixty-five billion, forty-six million, four hundred forty-eight thousand, three hundred ninety-three".