16638573424 has 80 divisors (see below), whose sum is σ = 36864140544. Its totient is φ = 7206796800.

The previous prime is 16638573397. The next prime is 16638573431. The reversal of 16638573424 is 42437583661.

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 in 15 ways as a sum of consecutive naturals, for example, 283477 + ... + 337099.

Almost surely, 2^16638573424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16638573424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18432070272).

16638573424 is an abundant number, since it is smaller than the sum of its proper divisors (20225567120).

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

16638573424 is a wasteful number, since it uses less digits than its factorization.

16638573424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53726 (or 53720 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 49.

The spelling of 16638573424 in words is "sixteen billion, six hundred thirty-eight million, five hundred seventy-three thousand, four hundred twenty-four".