16655220560201 has 4 divisors (see below), whose sum is σ = 16655519648532. Its totient is φ = 16654921471872.

The previous prime is 16655220560197. The next prime is 16655220560213. The reversal of 16655220560201 is 10206502255661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16608469471801 + 46751088400 = 4075349^2 + 216220^2 .

It is a cyclic number.

It is not a de Polignac number, because 16655220560201 - 2² = 16655220560197 is a prime.

It is a super-2 number, since 2×16655220560201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16655220569201) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 149460620 + ... + 149572013.

It is an arithmetic number, because the mean of its divisors is an integer number (4163879912133).

Almost surely, 2^{16655220560201} is an apocalyptic number.

It is an amenable number.

16655220560201 is a deficient number, since it is larger than the sum of its proper divisors (299088331).

16655220560201 is an equidigital number, since it uses as much as digits as its factorization.

16655220560201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299088330.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 16655220560201 in words is "sixteen trillion, six hundred fifty-five billion, two hundred twenty million, five hundred sixty thousand, two hundred one".