16653621606 has 48 divisors (see below), whose sum is σ = 34626430800. Its totient is φ = 5339426176.

The previous prime is 16653621587. The next prime is 16653621629. The reversal of 16653621606 is 60612635661.

It is a super-2 number, since 2×16653621606² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1351240 + ... + 1363508.

It is an arithmetic number, because the mean of its divisors is an integer number (721383975).

Almost surely, 2^16653621606 is an apocalyptic number.

16653621606 is an abundant number, since it is smaller than the sum of its proper divisors (17972809194).

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

16653621606 is a wasteful number, since it uses less digits than its factorization.

16653621606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12601 (or 12572 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 42.

The spelling of 16653621606 in words is "sixteen billion, six hundred fifty-three million, six hundred twenty-one thousand, six hundred six".