16734613221 has 24 divisors (see below), whose sum is σ = 25944735960. Its totient is φ = 10356304896.

The previous prime is 16734613211. The next prime is 16734613277. The reversal of 16734613221 is 12231643761.

16734613221 is a `hidden beast` number, since 1 + 6 + 7 + 34 + 613 + 2 + 2 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1262736225 + 15471876996 = 35535^2 + 124386^2 .

It is not a de Polignac number, because 16734613221 - 2⁹ = 16734612709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16734613211) 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 23 ways as a sum of consecutive naturals, for example, 737986 + ... + 760323.

It is an arithmetic number, because the mean of its divisors is an integer number (1081030665).

Almost surely, 2^16734613221 is an apocalyptic number.

It is an amenable number.

16734613221 is a deficient number, since it is larger than the sum of its proper divisors (9210122739).

16734613221 is a wasteful number, since it uses less digits than its factorization.

16734613221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498405 (or 1498402 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The spelling of 16734613221 in words is "sixteen billion, seven hundred thirty-four million, six hundred thirteen thousand, two hundred twenty-one".