16305722538 has 64 divisors (see below), whose sum is σ = 37632107520. Its totient is φ = 4613760000.

The previous prime is 16305722527. The next prime is 16305722569. The reversal of 16305722538 is 83522750361.

It is a happy number.

It is a super-2 number, since 2×16305722538² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16305722538.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1882698 + ... + 1891338.

It is an arithmetic number, because the mean of its divisors is an integer number (588001680).

Almost surely, 2^16305722538 is an apocalyptic number.

16305722538 is an abundant number, since it is smaller than the sum of its proper divisors (21326384982).

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

16305722538 is a wasteful number, since it uses less digits than its factorization.

16305722538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9083.

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 16305722538 in words is "sixteen billion, three hundred five million, seven hundred twenty-two thousand, five hundred thirty-eight".