161500671208 has 32 divisors (see below), whose sum is σ = 308122848000. Its totient is φ = 79336149120.

The previous prime is 161500671203. The next prime is 161500671221. The reversal of 161500671208 is 802176005161.

It is not an unprimeable number, because it can be changed into a prime (161500671203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 732988 + ... + 927508.

It is an arithmetic number, because the mean of its divisors is an integer number (9628839000).

Almost surely, 2^161500671208 is an apocalyptic number.

It is an amenable number.

161500671208 is a deficient number, since it is larger than the sum of its proper divisors (146622176792).

161500671208 is a wasteful number, since it uses less digits than its factorization.

161500671208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196345 (or 196341 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 37.

Adding to 161500671208 its reverse (802176005161), we get a palindrome (963676676369).

The spelling of 161500671208 in words is "one hundred sixty-one billion, five hundred million, six hundred seventy-one thousand, two hundred eight".