1982305161 has 12 divisors (see below), whose sum is σ = 2903659200. Its totient is φ = 1302923160.

The previous prime is 1982305159. The next prime is 1982305183. The reversal of 1982305161 is 1615032891.

1982305161 is a `hidden beast` number, since 198 + 2 + 305 + 161 = 666.

It is not a de Polignac number, because 1982305161 - 2¹ = 1982305159 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1982305141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1550461 + ... + 1551738.

It is an arithmetic number, because the mean of its divisors is an integer number (241971600).

Almost surely, 2^1982305161 is an apocalyptic number.

It is an amenable number.

1982305161 is a deficient number, since it is larger than the sum of its proper divisors (921354039).

1982305161 is a wasteful number, since it uses less digits than its factorization.

1982305161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3102276 (or 3102273 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 1982305161 is about 44523.0857084277. The cubic root of 1982305161 is about 1256.1943542888.

The spelling of 1982305161 in words is "one billion, nine hundred eighty-two million, three hundred five thousand, one hundred sixty-one".