16009168821 has 16 divisors (see below), whose sum is σ = 22919511168. Its totient is φ = 9903488000.

The previous prime is 16009168781. The next prime is 16009168823. The reversal of 16009168821 is 12886190061.

It is a cyclic number.

It is not a de Polignac number, because 16009168821 - 2¹¹ = 16009166773 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16009168823) 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 15 ways as a sum of consecutive naturals, for example, 2206980 + ... + 2214221.

It is an arithmetic number, because the mean of its divisors is an integer number (1432469448).

Almost surely, 2^16009168821 is an apocalyptic number.

It is an amenable number.

16009168821 is a deficient number, since it is larger than the sum of its proper divisors (6910342347).

16009168821 is a wasteful number, since it uses less digits than its factorization.

16009168821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4421292.

The product of its (nonzero) digits is 41472, while the sum is 42.

The spelling of 16009168821 in words is "sixteen billion, nine million, one hundred sixty-eight thousand, eight hundred twenty-one".