16722717698 has 4 divisors (see below), whose sum is σ = 25084076550. Its totient is φ = 8361358848.

The previous prime is 16722717677. The next prime is 16722717701. The reversal of 16722717698 is 89671722761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89671722761 = 5099 ⋅17586139.

It can be written as a sum of positive squares in only one way, i.e., 14862779569 + 1859938129 = 121913^2 + 43127^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4180679423 + ... + 4180679426.

Almost surely, 2^16722717698 is an apocalyptic number.

16722717698 is a deficient number, since it is larger than the sum of its proper divisors (8361358852).

16722717698 is an equidigital number, since it uses as much as digits as its factorization.

16722717698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8361358851.

The product of its digits is 3556224, while the sum is 56.

The spelling of 16722717698 in words is "sixteen billion, seven hundred twenty-two million, seven hundred seventeen thousand, six hundred ninety-eight".