16321555236044 has 6 divisors (see below), whose sum is σ = 28562721663084. Its totient is φ = 8160777618020.

The previous prime is 16321555236037. The next prime is 16321555236053. The reversal of 16321555236044 is 44063255512361.

It is a self number, because there is not a number n which added to its sum of digits gives 16321555236044.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2040194404502 + ... + 2040194404509.

It is an arithmetic number, because the mean of its divisors is an integer number (4760453610514).

Almost surely, 2^{16321555236044} is an apocalyptic number.

It is an amenable number.

16321555236044 is a deficient number, since it is larger than the sum of its proper divisors (12241166427040).

16321555236044 is a wasteful number, since it uses less digits than its factorization.

16321555236044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4080388809015 (or 4080388809013 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 47.

The spelling of 16321555236044 in words is "sixteen trillion, three hundred twenty-one billion, five hundred fifty-five million, two hundred thirty-six thousand, forty-four".