16643311345 has 8 divisors (see below), whose sum is σ = 21023130240. Its totient is φ = 12613878000.

The previous prime is 16643311337. The next prime is 16643311387. The reversal of 16643311345 is 54311334661.

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

It is not a de Polignac number, because 16643311345 - 2³ = 16643311337 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87596281 + ... + 87596470.

It is an arithmetic number, because the mean of its divisors is an integer number (2627891280).

Almost surely, 2^16643311345 is an apocalyptic number.

It is an amenable number.

16643311345 is a deficient number, since it is larger than the sum of its proper divisors (4379818895).

16643311345 is a wasteful number, since it uses less digits than its factorization.

16643311345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175192775.

The product of its digits is 77760, while the sum is 37.

The spelling of 16643311345 in words is "sixteen billion, six hundred forty-three million, three hundred eleven thousand, three hundred forty-five".