16721464723 has 16 divisors (see below), whose sum is σ = 17689744800. Its totient is φ = 15784761600.

The previous prime is 16721464717. The next prime is 16721464733. The reversal of 16721464723 is 32746412761.

It is a cyclic number.

It is not a de Polignac number, because 16721464723 - 2²⁹ = 16184593811 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16721464723.

It is not an unprimeable number, because it can be changed into a prime (16721464733) 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, 244128 + ... + 305026.

It is an arithmetic number, because the mean of its divisors is an integer number (1105609050).

Almost surely, 2^16721464723 is an apocalyptic number.

16721464723 is a deficient number, since it is larger than the sum of its proper divisors (968280077).

16721464723 is a wasteful number, since it uses less digits than its factorization.

16721464723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61158.

The product of its digits is 338688, while the sum is 43.

The spelling of 16721464723 in words is "sixteen billion, seven hundred twenty-one million, four hundred sixty-four thousand, seven hundred twenty-three".