16554424661411 has 16 divisors (see below), whose sum is σ = 20446671861504. Its totient is φ = 13051723597344.

The previous prime is 16554424661407. The next prime is 16554424661477. The reversal of 16554424661411 is 11416642445561.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 16554424661411 - 2² = 16554424661407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16554424661411.

It is not an unprimeable number, because it can be changed into a prime (16554424664411) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 321381941 + ... + 321433446.

It is an arithmetic number, because the mean of its divisors is an integer number (1277916991344).

Almost surely, 2^{16554424661411} is an apocalyptic number.

16554424661411 is a deficient number, since it is larger than the sum of its proper divisors (3892247200093).

16554424661411 is a wasteful number, since it uses less digits than its factorization.

16554424661411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642815690.

The product of its digits is 2764800, while the sum is 50.

The spelling of 16554424661411 in words is "sixteen trillion, five hundred fifty-four billion, four hundred twenty-four million, six hundred sixty-one thousand, four hundred eleven".