165162799871 has 4 divisors (see below), whose sum is σ = 165349004592. Its totient is φ = 164976595152.

The previous prime is 165162799847. The next prime is 165162799897. The reversal of 165162799871 is 178997261561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 178997261561 = 71 ⋅2521088191.

It is a cyclic number.

It is not a de Polignac number, because 165162799871 - 2¹⁰ = 165162798847 is a prime.

It is a super-2 number, since 2×165162799871² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165162799771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93101030 + ... + 93102803.

It is an arithmetic number, because the mean of its divisors is an integer number (41337251148).

Almost surely, 2^165162799871 is an apocalyptic number.

165162799871 is a deficient number, since it is larger than the sum of its proper divisors (186204721).

165162799871 is an equidigital number, since it uses as much as digits as its factorization.

165162799871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186204720.

The product of its digits is 11430720, while the sum is 62.

The spelling of 165162799871 in words is "one hundred sixty-five billion, one hundred sixty-two million, seven hundred ninety-nine thousand, eight hundred seventy-one".