161600161616 has 20 divisors (see below), whose sum is σ = 329579277600. Its totient is φ = 76547444832.

The previous prime is 161600161589. The next prime is 161600161627. The reversal of 161600161616 is 616161006161.

It is a super-2 number, since 2×161600161616² (a number of 23 digits) contains 22 as substring.

161600161616 is a modest number, since divided by 161616 gives 161600 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265789436 + ... + 265790043.

It is an arithmetic number, because the mean of its divisors is an integer number (16478963880).

Almost surely, 2^161600161616 is an apocalyptic number.

161600161616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161600161616 is an abundant number, since it is smaller than the sum of its proper divisors (167979115984).

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

161600161616 is a wasteful number, since it uses less digits than its factorization.

161600161616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531579506 (or 531579500 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 35.

Adding to 161600161616 its reverse (616161006161), we get a palindrome (777761167777).

The spelling of 161600161616 in words is "one hundred sixty-one billion, six hundred million, one hundred sixty-one thousand, six hundred sixteen".