165611101616 has 20 divisors (see below), whose sum is σ = 326310011400. Its totient is φ = 81402066432.

The previous prime is 165611101613. The next prime is 165611101633. The reversal of 165611101616 is 616101116561.

165611101616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×165611101616² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (165611101613) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 87716801 + ... + 87718688.

It is an arithmetic number, because the mean of its divisors is an integer number (16315500570).

Almost surely, 2^165611101616 is an apocalyptic number.

165611101616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

165611101616 is a deficient number, since it is larger than the sum of its proper divisors (160698909784).

165611101616 is a wasteful number, since it uses less digits than its factorization.

165611101616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175435556 (or 175435550 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 35.

The spelling of 165611101616 in words is "one hundred sixty-five billion, six hundred eleven million, one hundred one thousand, six hundred sixteen".