16501605018 has 16 divisors (see below), whose sum is σ = 33013768320. Its totient is φ = 5498775296.

The previous prime is 16501605017. The next prime is 16501605031. The reversal of 16501605018 is 81050610561.

16501605018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 16501605018.

It is not an unprimeable number, because it can be changed into a prime (16501605017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 419538 + ... + 457181.

It is an arithmetic number, because the mean of its divisors is an integer number (2063360520).

Almost surely, 2^16501605018 is an apocalyptic number.

16501605018 is an abundant number, since it is smaller than the sum of its proper divisors (16512163302).

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

16501605018 is a wasteful number, since it uses less digits than its factorization.

16501605018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879861.

The product of its (nonzero) digits is 7200, while the sum is 33.

The spelling of 16501605018 in words is "sixteen billion, five hundred one million, six hundred five thousand, eighteen".