16643355555340 has 96 divisors (see below), whose sum is σ = 40648411077120. Its totient is φ = 5677873191936.

The previous prime is 16643355555329. The next prime is 16643355555341. The reversal of 16643355555340 is 4355555334661.

It is not an unprimeable number, because it can be changed into a prime (16643355555341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55859482 + ... + 56156641.

It is an arithmetic number, because the mean of its divisors is an integer number (423420948720).

Almost surely, 2^{16643355555340} is an apocalyptic number.

16643355555340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16643355555340 is an abundant number, since it is smaller than the sum of its proper divisors (24005055521780).

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

16643355555340 is a wasteful number, since it uses less digits than its factorization.

16643355555340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112016191 (or 112016189 counting only the distinct ones).

The product of its (nonzero) digits is 48600000, while the sum is 55.

The spelling of 16643355555340 in words is "sixteen trillion, six hundred forty-three billion, three hundred fifty-five million, five hundred fifty-five thousand, three hundred forty".