165243287795 has 32 divisors (see below), whose sum is σ = 202680092160. Its totient is φ = 129303947520.

The previous prime is 165243287791. The next prime is 165243287849. The reversal of 165243287795 is 597782342561.

It is not a de Polignac number, because 165243287795 - 2² = 165243287791 is a prime.

It is a super-2 number, since 2×165243287795² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (165243287791) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85572980 + ... + 85574910.

It is an arithmetic number, because the mean of its divisors is an integer number (6333752880).

Almost surely, 2^165243287795 is an apocalyptic number.

165243287795 is a deficient number, since it is larger than the sum of its proper divisors (37436804365).

165243287795 is a wasteful number, since it uses less digits than its factorization.

165243287795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3995.

The product of its digits is 25401600, while the sum is 59.

The spelling of 165243287795 in words is "one hundred sixty-five billion, two hundred forty-three million, two hundred eighty-seven thousand, seven hundred ninety-five".