16638014553444 has 144 divisors (see below), whose sum is σ = 44003835657600. Its totient is φ = 5295788812800.

The previous prime is 16638014553389. The next prime is 16638014553449. The reversal of 16638014553444 is 44435541083661.

16638014553444 is a `hidden beast` number, since 1 + 6 + 6 + 3 + 8 + 0 + 145 + 53 + 444 = 666.

It is a super-2 number, since 2×16638014553444² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16638014553449) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16195632 + ... + 17192280.

Almost surely, 2^{16638014553444} 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 16638014553444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22001917828800).

16638014553444 is an abundant number, since it is smaller than the sum of its proper divisors (27365821104156).

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

16638014553444 is a wasteful number, since it uses less digits than its factorization.

16638014553444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996930 (or 996925 counting only the distinct ones).

The product of its (nonzero) digits is 16588800, while the sum is 54.

The spelling of 16638014553444 in words is "sixteen trillion, six hundred thirty-eight billion, fourteen million, five hundred fifty-three thousand, four hundred forty-four".