161500161616 has 40 divisors (see below), whose sum is σ = 320308032704. Its totient is φ = 78841486080.

The previous prime is 161500161607. The next prime is 161500161617. The reversal of 161500161616 is 616161005161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161500161617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1776796 + ... + 1865476.

Almost surely, 2^161500161616 is an apocalyptic number.

161500161616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161500161616 is a deficient number, since it is larger than the sum of its proper divisors (158807871088).

161500161616 is a wasteful number, since it uses less digits than its factorization.

161500161616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91379 (or 91373 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 34.

Adding to 161500161616 its reverse (616161005161), we get a palindrome (777661166777).

The spelling of 161500161616 in words is "one hundred sixty-one billion, five hundred million, one hundred sixty-one thousand, six hundred sixteen".