161946004 has 24 divisors (see below), whose sum is σ = 309960000. Its totient is φ = 73423680.

The previous prime is 161945989. The next prime is 161946007. The reversal of 161946004 is 400649161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161946007) 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, 13497 + ... + 22495.

It is an arithmetic number, because the mean of its divisors is an integer number (12915000).

Almost surely, 2^161946004 is an apocalyptic number.

It is an amenable number.

161946004 is a deficient number, since it is larger than the sum of its proper divisors (148013996).

161946004 is a wasteful number, since it uses less digits than its factorization.

161946004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9423 (or 9421 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 161946004 is about 12725.8007213692. The cubic root of 161946004 is about 545.0756049196.

The spelling of 161946004 in words is "one hundred sixty-one million, nine hundred forty-six thousand, four".