16721766042 has 8 divisors (see below), whose sum is σ = 33443532096. Its totient is φ = 5573922012.

The previous prime is 16721766037. The next prime is 16721766053. The reversal of 16721766042 is 24066712761.

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

16721766042 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 16721765985 and 16721766003.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1393480498 + ... + 1393480509.

It is an arithmetic number, because the mean of its divisors is an integer number (4180441512).

Almost surely, 2^16721766042 is an apocalyptic number.

16721766042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16721766042 is a wasteful number, since it uses less digits than its factorization.

16721766042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2786961012.

The product of its (nonzero) digits is 169344, while the sum is 42.

The spelling of 16721766042 in words is "sixteen billion, seven hundred twenty-one million, seven hundred sixty-six thousand, forty-two".