16555221153472 has 112 divisors (see below), whose sum is σ = 35932866342912. Its totient is φ = 7544956446720.

The previous prime is 16555221153377. The next prime is 16555221153481. The reversal of 16555221153472 is 27435112255561.

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 15 ways as a sum of consecutive naturals, for example, 594528 + ... + 5784799.

It is an arithmetic number, because the mean of its divisors is an integer number (320829163776).

Almost surely, 2^{16555221153472} is an apocalyptic number.

It is an amenable number.

16555221153472 is an abundant number, since it is smaller than the sum of its proper divisors (19377645189440).

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

16555221153472 is a wasteful number, since it uses less digits than its factorization.

16555221153472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6379446 (or 6379436 counting only the distinct ones).

The product of its digits is 2520000, while the sum is 49.

The spelling of 16555221153472 in words is "sixteen trillion, five hundred fifty-five billion, two hundred twenty-one million, one hundred fifty-three thousand, four hundred seventy-two".