161001616 has 40 divisors (see below), whose sum is σ = 317390400. Its totient is φ = 79108224.

The previous prime is 161001613. The next prime is 161001671. The reversal of 161001616 is 616100161.

It is a super-2 number, since 2×161001616² = 51843040709222912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161001613) 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, 268485 + ... + 269083.

It is an arithmetic number, because the mean of its divisors is an integer number (7934760).

Almost surely, 2^161001616 is an apocalyptic number.

161001616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161001616 is a deficient number, since it is larger than the sum of its proper divisors (156388784).

161001616 is a wasteful number, since it uses less digits than its factorization.

161001616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871 (or 865 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 161001616 is about 12688.6412196106. The cubic root of 161001616 is about 544.0140026672.

Adding to 161001616 its reverse (616100161), we get a palindrome (777101777).

The spelling of 161001616 in words is "one hundred sixty-one million, one thousand, six hundred sixteen".