16221454327544 has 8 divisors (see below), whose sum is σ = 30415226864160. Its totient is φ = 8110727163768.

The previous prime is 16221454327457. The next prime is 16221454327601. The reversal of 16221454327544 is 44572345412261.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 16221454327492 and 16221454327501.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1013840895464 + ... + 1013840895479.

It is an arithmetic number, because the mean of its divisors is an integer number (3801903358020).

Almost surely, 2^{16221454327544} is an apocalyptic number.

It is an amenable number.

16221454327544 is a deficient number, since it is larger than the sum of its proper divisors (14193772536616).

16221454327544 is a wasteful number, since it uses less digits than its factorization.

16221454327544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027681790949 (or 2027681790945 counting only the distinct ones).

The product of its digits is 6451200, while the sum is 50.

The spelling of 16221454327544 in words is "sixteen trillion, two hundred twenty-one billion, four hundred fifty-four million, three hundred twenty-seven thousand, five hundred forty-four".