18306073161 has 12 divisors (see below), whose sum is σ = 27997523892. Its totient is φ = 11486163456.

The previous prime is 18306073147. The next prime is 18306073169. The reversal of 18306073161 is 16137060381.

18306073161 is a `hidden beast` number, since 1 + 8 + 30 + 607 + 3 + 16 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7185105225 + 11120967936 = 84765^2 + 105456^2 .

It is not a de Polignac number, because 18306073161 - 2⁹ = 18306072649 is a prime.

It is a super-3 number, since 3×18306073161³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (18306073169) 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, 59823616 + ... + 59823921.

It is an arithmetic number, because the mean of its divisors is an integer number (2333126991).

Almost surely, 2^18306073161 is an apocalyptic number.

It is an amenable number.

18306073161 is a deficient number, since it is larger than the sum of its proper divisors (9691450731).

18306073161 is a wasteful number, since it uses less digits than its factorization.

18306073161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119647560 (or 119647557 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The spelling of 18306073161 in words is "eighteen billion, three hundred six million, seventy-three thousand, one hundred sixty-one".