16551323984 has 20 divisors (see below), whose sum is σ = 34534974516. Its totient is φ = 7639072512.

The previous prime is 16551323959. The next prime is 16551324001. The reversal of 16551323984 is 48932315561.

It can be written as a sum of positive squares in 2 ways, for example, as 7596865600 + 8954458384 = 87160^2 + 94628^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39786629 + ... + 39787044.

Almost surely, 2^16551323984 is an apocalyptic number.

It is an amenable number.

16551323984 is an abundant number, since it is smaller than the sum of its proper divisors (17983650532).

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

16551323984 is a wasteful number, since it uses less digits than its factorization.

16551323984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79573694 (or 79573688 counting only the distinct ones).

The product of its digits is 777600, while the sum is 47.

The spelling of 16551323984 in words is "sixteen billion, five hundred fifty-one million, three hundred twenty-three thousand, nine hundred eighty-four".