16721151622118 has 32 divisors (see below), whose sum is σ = 26880169567680. Its totient is φ = 7780769124480.

The previous prime is 16721151622039. The next prime is 16721151622139. The reversal of 16721151622118 is 81122615112761.

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 15 ways as a sum of consecutive naturals, for example, 119718668 + ... + 119858256.

It is an arithmetic number, because the mean of its divisors is an integer number (840005298990).

Almost surely, 2^{16721151622118} is an apocalyptic number.

16721151622118 is a deficient number, since it is larger than the sum of its proper divisors (10159017945562).

16721151622118 is a wasteful number, since it uses less digits than its factorization.

16721151622118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210032.

The product of its digits is 80640, while the sum is 44.

Adding to 16721151622118 its reverse (81122615112761), we get a palindrome (97843766734879).

The spelling of 16721151622118 in words is "sixteen trillion, seven hundred twenty-one billion, one hundred fifty-one million, six hundred twenty-two thousand, one hundred eighteen".