165439872687 has 8 divisors (see below), whose sum is σ = 220643792640. Its totient is φ = 110264600600.

The previous prime is 165439872679. The next prime is 165439872797. The reversal of 165439872687 is 786278934561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165439872687 - 2³ = 165439872679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165439871687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7148487 + ... + 7171592.

It is an arithmetic number, because the mean of its divisors is an integer number (27580474080).

Almost surely, 2^165439872687 is an apocalyptic number.

165439872687 is a deficient number, since it is larger than the sum of its proper divisors (55203919953).

165439872687 is a wasteful number, since it uses less digits than its factorization.

165439872687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14323933.

The product of its digits is 121927680, while the sum is 66.

The spelling of 165439872687 in words is "one hundred sixty-five billion, four hundred thirty-nine million, eight hundred seventy-two thousand, six hundred eighty-seven".