16221600872 has 32 divisors (see below), whose sum is σ = 32320986120. Its totient is φ = 7606118400.

The previous prime is 16221600869. The next prime is 16221600887. The reversal of 16221600872 is 27800612261.

It can be written as a sum of positive squares in 4 ways, for example, as 9857709796 + 6363891076 = 99286^2 + 79774^2 .

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 7 ways as a sum of consecutive naturals, for example, 177629 + ... + 252972.

Almost surely, 2^16221600872 is an apocalyptic number.

It is an amenable number.

16221600872 is a deficient number, since it is larger than the sum of its proper divisors (16099385248).

16221600872 is a wasteful number, since it uses less digits than its factorization.

16221600872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430901 (or 430897 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The spelling of 16221600872 in words is "sixteen billion, two hundred twenty-one million, six hundred thousand, eight hundred seventy-two".