16554224820161 has 4 divisors (see below), whose sum is σ = 18919114080192. Its totient is φ = 14189335560132.

The previous prime is 16554224820137. The next prime is 16554224820181. The reversal of 16554224820161 is 16102842245561.

16554224820161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16554224820161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16554224820131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1182444630005 + ... + 1182444630018.

It is an arithmetic number, because the mean of its divisors is an integer number (4729778520048).

Almost surely, 2^{16554224820161} is an apocalyptic number.

It is an amenable number.

16554224820161 is a deficient number, since it is larger than the sum of its proper divisors (2364889260031).

16554224820161 is an equidigital number, since it uses as much as digits as its factorization.

16554224820161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2364889260030.

The product of its (nonzero) digits is 921600, while the sum is 47.

The spelling of 16554224820161 in words is "sixteen trillion, five hundred fifty-four billion, two hundred twenty-four million, eight hundred twenty thousand, one hundred sixty-one".