165943800943 has 8 divisors (see below), whose sum is σ = 171861488640. Its totient is φ = 160125570360.

The previous prime is 165943800917. The next prime is 165943800973. The reversal of 165943800943 is 349008349561.

It is a happy number.

165943800943 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165943800943 - 2²¹ = 165941703791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165943800973) 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 in 7 ways as a sum of consecutive naturals, for example, 24860883 + ... + 24867556.

It is an arithmetic number, because the mean of its divisors is an integer number (21482686080).

Almost surely, 2^165943800943 is an apocalyptic number.

165943800943 is a deficient number, since it is larger than the sum of its proper divisors (5917687697).

165943800943 is an equidigital number, since it uses as much as digits as its factorization.

165943800943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49728557.

The product of its (nonzero) digits is 2799360, while the sum is 52.

The spelling of 165943800943 in words is "one hundred sixty-five billion, nine hundred forty-three million, eight hundred thousand, nine hundred forty-three".