161928164 has 6 divisors (see below), whose sum is σ = 283374294. Its totient is φ = 80964080.

The previous prime is 161928161. The next prime is 161928167. The reversal of 161928164 is 461829161.

It is an interprime number because it is at equal distance from previous prime (161928161) and next prime (161928167).

It can be written as a sum of positive squares in only one way, i.e., 153760000 + 8168164 = 12400^2 + 2858^2 .

It is not an unprimeable number, because it can be changed into a prime (161928161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20241017 + ... + 20241024.

It is an arithmetic number, because the mean of its divisors is an integer number (47229049).

Almost surely, 2^161928164 is an apocalyptic number.

It is an amenable number.

161928164 is a deficient number, since it is larger than the sum of its proper divisors (121446130).

161928164 is a wasteful number, since it uses less digits than its factorization.

161928164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40482045 (or 40482043 counting only the distinct ones).

The product of its digits is 20736, while the sum is 38.

The square root of 161928164 is about 12725.0997638525. The cubic root of 161928164 is about 545.0555889768.

The spelling of 161928164 in words is "one hundred sixty-one million, nine hundred twenty-eight thousand, one hundred sixty-four".