16721675575780 has 72 divisors (see below), whose sum is σ = 42624693574848. Its totient is φ = 5483878690752.

The previous prime is 16721675575741. The next prime is 16721675575831. The reversal of 16721675575780 is 8757557612761.

It is a super-2 number, since 2×16721675575780² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 370910814 + ... + 370955893.

It is an arithmetic number, because the mean of its divisors is an integer number (592009632984).

Almost surely, 2^{16721675575780} is an apocalyptic number.

16721675575780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16721675575780 is an abundant number, since it is smaller than the sum of its proper divisors (25903017999068).

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

16721675575780 is a wasteful number, since it uses less digits than its factorization.

16721675575780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741866753 (or 741866744 counting only the distinct ones).

The product of its (nonzero) digits is 172872000, while the sum is 67.

The spelling of 16721675575780 in words is "sixteen trillion, seven hundred twenty-one billion, six hundred seventy-five million, five hundred seventy-five thousand, seven hundred eighty".