161005616 has 10 divisors (see below), whose sum is σ = 311948412. Its totient is φ = 80502800.

The previous prime is 161005613. The next prime is 161005619. The reversal of 161005616 is 616500161.

It is an interprime number because it is at equal distance from previous prime (161005613) and next prime (161005619).

It is not an unprimeable number, because it can be changed into a prime (161005613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5031410 + ... + 5031441.

Almost surely, 2^161005616 is an apocalyptic number.

161005616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161005616 is a deficient number, since it is larger than the sum of its proper divisors (150942796).

161005616 is a wasteful number, since it uses less digits than its factorization.

161005616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10062859 (or 10062853 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 161005616 is about 12688.7988399218. The cubic root of 161005616 is about 544.0185078767.

Adding to 161005616 its reverse (616500161), we get a palindrome (777505777).

The spelling of 161005616 in words is "one hundred sixty-one million, five thousand, six hundred sixteen".