16161317668 has 36 divisors (see below), whose sum is σ = 29252588400. Its totient is φ = 7812364560.

The previous prime is 16161317657. The next prime is 16161317713. The reversal of 16161317668 is 86671316161.

It is a super-2 number, since 2×16161317668² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7698483 + ... + 7700581.

It is an arithmetic number, because the mean of its divisors is an integer number (812571900).

Almost surely, 2^16161317668 is an apocalyptic number.

It is an amenable number.

16161317668 is a deficient number, since it is larger than the sum of its proper divisors (13091270732).

16161317668 is a wasteful number, since it uses less digits than its factorization.

16161317668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4168 (or 4135 counting only the distinct ones).

The product of its digits is 217728, while the sum is 46.

The spelling of 16161317668 in words is "sixteen billion, one hundred sixty-one million, three hundred seventeen thousand, six hundred sixty-eight".