18671287161 has 32 divisors (see below), whose sum is σ = 26023358592. Its totient is φ = 11899630080.

The previous prime is 18671287147. The next prime is 18671287169. The reversal of 18671287161 is 16178217681.

It is not a de Polignac number, because 18671287161 - 2²⁶ = 18604178297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18671287161.

It is not an unprimeable number, because it can be changed into a prime (18671287169) 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 31 ways as a sum of consecutive naturals, for example, 953691 + ... + 973071.

It is an arithmetic number, because the mean of its divisors is an integer number (813229956).

Almost surely, 2^18671287161 is an apocalyptic number.

It is an amenable number.

18671287161 is a deficient number, since it is larger than the sum of its proper divisors (7352071431).

18671287161 is a wasteful number, since it uses less digits than its factorization.

18671287161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19593.

The product of its digits is 225792, while the sum is 48.

The spelling of 18671287161 in words is "eighteen billion, six hundred seventy-one million, two hundred eighty-seven thousand, one hundred sixty-one".