16555220366764 has 12 divisors (see below), whose sum is σ = 29678260901688. Its totient is φ = 8075717252000.

The previous prime is 16555220366759. The next prime is 16555220366779. The reversal of 16555220366764 is 46766302255561.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 16555220366699 and 16555220366708.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50473232662 + ... + 50473232989.

It is an arithmetic number, because the mean of its divisors is an integer number (2473188408474).

Almost surely, 2^{16555220366764} is an apocalyptic number.

It is an amenable number.

16555220366764 is a deficient number, since it is larger than the sum of its proper divisors (13123040534924).

16555220366764 is a wasteful number, since it uses less digits than its factorization.

16555220366764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100946465696 (or 100946465694 counting only the distinct ones).

The product of its (nonzero) digits is 54432000, while the sum is 58.

The spelling of 16555220366764 in words is "sixteen trillion, five hundred fifty-five billion, two hundred twenty million, three hundred sixty-six thousand, seven hundred sixty-four".