16500221755760 has 40 divisors (see below), whose sum is σ = 38617075316256. Its totient is φ = 6556379500800.

The previous prime is 16500221755729. The next prime is 16500221755807. The reversal of 16500221755760 is 6755712200561.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 682944119 + ... + 682968278.

Almost surely, 2^{16500221755760} is an apocalyptic number.

16500221755760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16500221755760 is an abundant number, since it is smaller than the sum of its proper divisors (22116853560496).

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

16500221755760 is a wasteful number, since it uses less digits than its factorization.

16500221755760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1365912561 (or 1365912555 counting only the distinct ones).

The product of its (nonzero) digits is 882000, while the sum is 47.

The spelling of 16500221755760 in words is "sixteen trillion, five hundred billion, two hundred twenty-one million, seven hundred fifty-five thousand, seven hundred sixty".