165689641151 has 16 divisors (see below), whose sum is σ = 175785456000. Its totient is φ = 155731960800.

The previous prime is 165689641147. The next prime is 165689641157. The reversal of 165689641151 is 151146986561.

It is a cyclic number.

It is not a de Polignac number, because 165689641151 - 2² = 165689641147 is a prime.

It is a super-4 number, since 4×165689641151⁴ (a number of 46 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165689641093 and 165689641102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165689641157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16648925 + ... + 16658873.

It is an arithmetic number, because the mean of its divisors is an integer number (10986591000).

Almost surely, 2^165689641151 is an apocalyptic number.

165689641151 is a deficient number, since it is larger than the sum of its proper divisors (10095814849).

165689641151 is a wasteful number, since it uses less digits than its factorization.

165689641151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16790.

The product of its digits is 1555200, while the sum is 53.

The spelling of 165689641151 in words is "one hundred sixty-five billion, six hundred eighty-nine million, six hundred forty-one thousand, one hundred fifty-one".