16443575330645 has 4 divisors (see below), whose sum is σ = 19732290396780. Its totient is φ = 13154860264512.

The previous prime is 16443575330603. The next prime is 16443575330713. The reversal of 16443575330645 is 54603357534461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7931337285169 + 8512238045476 = 2816263^2 + 2917574^2 .

It is a cyclic number.

It is not a de Polignac number, because 16443575330645 - 2²⁸ = 16443306895189 is a prime.

It is a super-3 number, since 3×16443575330645³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1644357533060 + ... + 1644357533069.

It is an arithmetic number, because the mean of its divisors is an integer number (4933072599195).

Almost surely, 2^{16443575330645} is an apocalyptic number.

It is an amenable number.

16443575330645 is a deficient number, since it is larger than the sum of its proper divisors (3288715066135).

16443575330645 is an equidigital number, since it uses as much as digits as its factorization.

16443575330645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3288715066134.

The product of its (nonzero) digits is 54432000, while the sum is 56.

The spelling of 16443575330645 in words is "sixteen trillion, four hundred forty-three billion, five hundred seventy-five million, three hundred thirty thousand, six hundred forty-five".