164445143645 has 8 divisors (see below), whose sum is σ = 197726489856. Its totient is φ = 131294569936.

The previous prime is 164445143641. The next prime is 164445143657. The reversal of 164445143645 is 546341544461.

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 164445143645 - 2² = 164445143641 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 164445143645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164445143641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32690357 + ... + 32695386.

It is an arithmetic number, because the mean of its divisors is an integer number (24715811232).

Almost surely, 2^164445143645 is an apocalyptic number.

It is an amenable number.

164445143645 is a deficient number, since it is larger than the sum of its proper divisors (33281346211).

164445143645 is an equidigital number, since it uses as much as digits as its factorization.

164445143645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65386251.

The product of its digits is 2764800, while the sum is 47.

The spelling of 164445143645 in words is "one hundred sixty-four billion, four hundred forty-five million, one hundred forty-three thousand, six hundred forty-five".