16721512146 has 12 divisors (see below), whose sum is σ = 36229943022. Its totient is φ = 5573837376.

The previous prime is 16721512139. The next prime is 16721512183. The reversal of 16721512146 is 64121512761.

16721512146 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 12330992025 + 4390520121 = 111045^2 + 66261^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16721512146.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 464486431 + ... + 464486466.

Almost surely, 2^16721512146 is an apocalyptic number.

16721512146 is an abundant number, since it is smaller than the sum of its proper divisors (19508430876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16721512146 is a wasteful number, since it uses less digits than its factorization.

16721512146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928972905 (or 928972902 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The spelling of 16721512146 in words is "sixteen billion, seven hundred twenty-one million, five hundred twelve thousand, one hundred forty-six".