165271395807 has 12 divisors (see below), whose sum is σ = 272828970960. Its totient is φ = 94440797568.

The previous prime is 165271395799. The next prime is 165271395811. The reversal of 165271395807 is 708593172561.

165271395807 is a `hidden beast` number, since 1 + 6 + 5 + 27 + 1 + 39 + 580 + 7 = 666.

It is not a de Polignac number, because 165271395807 - 2³ = 165271395799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165271395847) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1311677682 + ... + 1311677807.

It is an arithmetic number, because the mean of its divisors is an integer number (22735747580).

Almost surely, 2^165271395807 is an apocalyptic number.

165271395807 is a deficient number, since it is larger than the sum of its proper divisors (107557575153).

165271395807 is a wasteful number, since it uses less digits than its factorization.

165271395807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2623355502 (or 2623355499 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 54.

The spelling of 165271395807 in words is "one hundred sixty-five billion, two hundred seventy-one million, three hundred ninety-five thousand, eight hundred seven".