16556211224 has 64 divisors (see below), whose sum is σ = 36526237440. Its totient is φ = 6887825280.

The previous prime is 16556211223. The next prime is 16556211263. The reversal of 16556211224 is 42211265561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16556211223) 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 15 ways as a sum of consecutive naturals, for example, 371414 + ... + 413594.

It is an arithmetic number, because the mean of its divisors is an integer number (570722460).

Almost surely, 2^16556211224 is an apocalyptic number.

16556211224 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16556211224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18263118720).

16556211224 is an abundant number, since it is smaller than the sum of its proper divisors (19970026216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16556211224 is a wasteful number, since it uses less digits than its factorization.

16556211224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42400 (or 42396 counting only the distinct ones).

The product of its digits is 28800, while the sum is 35.

Adding to 16556211224 its reverse (42211265561), we get a palindrome (58767476785).

The spelling of 16556211224 in words is "sixteen billion, five hundred fifty-six million, two hundred eleven thousand, two hundred twenty-four".