16873221278 has 8 divisors (see below), whose sum is σ = 25313046168. Its totient is φ = 8435539224.

The previous prime is 16873221269. The next prime is 16873221289. The reversal of 16873221278 is 87212237861.

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

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, 515876 + ... + 547607.

It is an arithmetic number, because the mean of its divisors is an integer number (3164130771).

Almost surely, 2^16873221278 is an apocalyptic number.

16873221278 is a deficient number, since it is larger than the sum of its proper divisors (8439824890).

16873221278 is a wasteful number, since it uses less digits than its factorization.

16873221278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071418.

The product of its digits is 451584, while the sum is 47.

The spelling of 16873221278 in words is "sixteen billion, eight hundred seventy-three million, two hundred twenty-one thousand, two hundred seventy-eight".