16339558221 has 40 divisors (see below), whose sum is σ = 27962383680. Its totient is φ = 9314471232.

The previous prime is 16339558171. The next prime is 16339558223. The reversal of 16339558221 is 12285593361.

16339558221 is a `hidden beast` number, since 1 + 63 + 3 + 9 + 5 + 582 + 2 + 1 = 666.

It is not a de Polignac number, because 16339558221 - 2¹⁹ = 16339033933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16339558223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 203185 + ... + 271961.

It is an arithmetic number, because the mean of its divisors is an integer number (699059592).

Almost surely, 2^16339558221 is an apocalyptic number.

It is an amenable number.

16339558221 is a deficient number, since it is larger than the sum of its proper divisors (11622825459).

16339558221 is an equidigital number, since it uses as much as digits as its factorization.

16339558221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69215 (or 69206 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The spelling of 16339558221 in words is "sixteen billion, three hundred thirty-nine million, five hundred fifty-eight thousand, two hundred twenty-one".