161978282 has 48 divisors (see below), whose sum is σ = 270915840. Its totient is φ = 72456384.

The previous prime is 161978273. The next prime is 161978293. The reversal of 161978282 is 282879161.

161978282 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2050319 + ... + 2050397.

It is an arithmetic number, because the mean of its divisors is an integer number (5644080).

Almost surely, 2^161978282 is an apocalyptic number.

161978282 is a deficient number, since it is larger than the sum of its proper divisors (108937558).

161978282 is a wasteful number, since it uses less digits than its factorization.

161978282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215 (or 186 counting only the distinct ones).

The product of its digits is 96768, while the sum is 44.

The square root of 161978282 is about 12727.0688691466. The cubic root of 161978282 is about 545.1118161282. Note that the first 3 decimals are identical.

The spelling of 161978282 in words is "one hundred sixty-one million, nine hundred seventy-eight thousand, two hundred eighty-two".