16720951443876 has 27 divisors (see below), whose sum is σ = 42266911501633. Its totient is φ = 5573642303040.

The previous prime is 16720951443841. The next prime is 16720951443929. The reversal of 16720951443876 is 67834415902761.

The square root of 16720951443876 is 4089126.

It is a perfect power (a square), and thus also a powerful number.

16720951443876 is a `hidden beast` number, since 1 + 6 + 7 + 2 + 0 + 9 + 514 + 43 + 8 + 76 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8181464826276 + 8539486617600 = 2860326^2 + 2922240^2 .

It is a super-3 number, since 3×16720951443876³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 24193996 + ... + 24875516.

It is a 1-persistent number, because it is pandigital, but 2⋅16720951443876 = 33441902887752 is not.

Almost surely, 2^{16720951443876} is an apocalyptic number.

16720951443876 is the 4089126-th square number.

It is an amenable number.

16720951443876 is an abundant number, since it is smaller than the sum of its proper divisors (25545960057757).

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

16720951443876 is an frugal number, since it uses more digits than its factorization.

16720951443876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363052 (or 681526 counting only the distinct ones).

The product of its (nonzero) digits is 60963840, while the sum is 63.

The spelling of 16720951443876 in words is "sixteen trillion, seven hundred twenty billion, nine hundred fifty-one million, four hundred forty-three thousand, eight hundred seventy-six".