16122551218 has 16 divisors (see below), whose sum is σ = 25360467480. Its totient is φ = 7676678016.

The previous prime is 16122551197. The next prime is 16122551219. The reversal of 16122551218 is 81215522161.

It can be written as a sum of positive squares in 4 ways, for example, as 15824885209 + 297666009 = 125797^2 + 17253^2 .

It is not an unprimeable number, because it can be changed into a prime (16122551219) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1899705 + ... + 1908172.

Almost surely, 2^16122551218 is an apocalyptic number.

16122551218 is a deficient number, since it is larger than the sum of its proper divisors (9237916262).

16122551218 is a wasteful number, since it uses less digits than its factorization.

16122551218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3807981.

The product of its digits is 9600, while the sum is 34.

The spelling of 16122551218 in words is "sixteen billion, one hundred twenty-two million, five hundred fifty-one thousand, two hundred eighteen".