161646383146 has 16 divisors (see below), whose sum is σ = 243688925376. Its totient is φ = 80417727936.

The previous prime is 161646383131. The next prime is 161646383147. The reversal of 161646383146 is 641383646161.

It is a super-2 number, since 2×161646383146² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161646383146.

It is not an unprimeable number, because it can be changed into a prime (161646383147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82005 + ... + 574471.

It is an arithmetic number, because the mean of its divisors is an integer number (15230557836).

Almost surely, 2^161646383146 is an apocalyptic number.

161646383146 is a deficient number, since it is larger than the sum of its proper divisors (82042542230).

161646383146 is a wasteful number, since it uses less digits than its factorization.

161646383146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493293.

The product of its digits is 1492992, while the sum is 49.

The spelling of 161646383146 in words is "one hundred sixty-one billion, six hundred forty-six million, three hundred eighty-three thousand, one hundred forty-six".