161500612 has 48 divisors (see below), whose sum is σ = 368323200. Its totient is φ = 60129792.

The previous prime is 161500567. The next prime is 161500621. The reversal of 161500612 is 216005161.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6862 + ... + 19237.

It is an arithmetic number, because the mean of its divisors is an integer number (7673400).

Almost surely, 2^161500612 is an apocalyptic number.

It is an amenable number.

161500612 is an abundant number, since it is smaller than the sum of its proper divisors (206822588).

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

161500612 is a wasteful number, since it uses less digits than its factorization.

161500612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26140 (or 26138 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 161500612 is about 12708.2891059340. The cubic root of 161500612 is about 544.5754480566.

Adding to 161500612 its reverse (216005161), we get a palindrome (377505773).

The spelling of 161500612 in words is "one hundred sixty-one million, five hundred thousand, six hundred twelve".