165695787845 has 16 divisors (see below), whose sum is σ = 232524589440. Its totient is φ = 110977642944.

The previous prime is 165695787827. The next prime is 165695787877. The reversal of 165695787845 is 548787596561.

It is not a de Polignac number, because 165695787845 - 2¹⁸ = 165695525701 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55046930 + ... + 55049939.

It is an arithmetic number, because the mean of its divisors is an integer number (14532786840).

Almost surely, 2^165695787845 is an apocalyptic number.

It is an amenable number.

165695787845 is a deficient number, since it is larger than the sum of its proper divisors (66828801595).

165695787845 is a wasteful number, since it uses less digits than its factorization.

165695787845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110096924.

The product of its digits is 508032000, while the sum is 71.

The spelling of 165695787845 in words is "one hundred sixty-five billion, six hundred ninety-five million, seven hundred eighty-seven thousand, eight hundred forty-five".