16556016227215 has 4 divisors (see below), whose sum is σ = 19867219472664. Its totient is φ = 13244812981768.

The previous prime is 16556016227189. The next prime is 16556016227239. The reversal of 16556016227215 is 51272261065561.

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

It is a cyclic number.

It is not a de Polignac number, because 16556016227215 - 2⁷ = 16556016227087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1655601622717 + ... + 1655601622726.

It is an arithmetic number, because the mean of its divisors is an integer number (4966804868166).

Almost surely, 2^{16556016227215} is an apocalyptic number.

16556016227215 is a deficient number, since it is larger than the sum of its proper divisors (3311203245449).

16556016227215 is an equidigital number, since it uses as much as digits as its factorization.

16556016227215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3311203245448.

The product of its (nonzero) digits is 1512000, while the sum is 49.

The spelling of 16556016227215 in words is "sixteen trillion, five hundred fifty-six billion, sixteen million, two hundred twenty-seven thousand, two hundred fifteen".