16721765700 has 72 divisors (see below), whose sum is σ = 48442003680. Its totient is φ = 4453574400.

The previous prime is 16721765657. The next prime is 16721765761. The reversal of 16721765700 is 756712761.

16721765700 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 23 ways as a sum of consecutive naturals, for example, 208936 + ... + 277664.

Almost surely, 2^16721765700 is an apocalyptic number.

16721765700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16721765700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24221001840).

16721765700 is an abundant number, since it is smaller than the sum of its proper divisors (31720237980).

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

16721765700 is a wasteful number, since it uses less digits than its factorization.

16721765700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69557 (or 69550 counting only the distinct ones).

The product of its (nonzero) digits is 123480, while the sum is 42.

The spelling of 16721765700 in words is "sixteen billion, seven hundred twenty-one million, seven hundred sixty-five thousand, seven hundred".