161984043513 has 8 divisors (see below), whose sum is σ = 239976360800. Its totient is φ = 107989362324.

The previous prime is 161984043469. The next prime is 161984043541. The reversal of 161984043513 is 315340489161.

161984043513 is a `hidden beast` number, since 1 + 6 + 1 + 98 + 4 + 0 + 43 + 513 = 666.

161984043513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161984043513 - 2¹³ = 161984035321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161984043553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2999704483 + ... + 2999704536.

It is an arithmetic number, because the mean of its divisors is an integer number (29997045100).

Almost surely, 2^161984043513 is an apocalyptic number.

It is an amenable number.

161984043513 is a deficient number, since it is larger than the sum of its proper divisors (77992317287).

161984043513 is an equidigital number, since it uses as much as digits as its factorization.

161984043513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5999409028 (or 5999409022 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 161984043513 in words is "one hundred sixty-one billion, nine hundred eighty-four million, forty-three thousand, five hundred thirteen".