80163163161 has 45 divisors (see below), whose sum is σ = 121116609999. Its totient is φ = 52839039744.

The previous prime is 80163163139. The next prime is 80163163163. The reversal of 80163163161 is 16136136108.

The square root of 80163163161 is 283131.

It is a perfect power (a square), and thus also a powerful number.

80163163161 is a `hidden beast` number, since 8 + 0 + 1 + 631 + 6 + 3 + 16 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19422603225 + 60740559936 = 139365^2 + 246456^2 .

It is a de Polignac number, because none of the positive numbers 2^k-80163163161 is a prime.

It is a super-2 number, since 2×80163163161² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (80163163163) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 415353081 + ... + 415353273.

Almost surely, 2^80163163161 is an apocalyptic number.

80163163161 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

80163163161 is the 283131-st square number.

80163163161 is the 141566-th centered octagonal number.

It is an amenable number.

80163163161 is a deficient number, since it is larger than the sum of its proper divisors (40953446838).

80163163161 is an frugal number, since it uses more digits than its factorization.

80163163161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724 (or 359 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

Multiplying 80163163161 by its sum of digits (36), we get a square (2885873873796 = 1698786²).

Adding to 80163163161 its reverse (16136136108), we get a palindrome (96299299269).

The spelling of 80163163161 in words is "eighty billion, one hundred sixty-three million, one hundred sixty-three thousand, one hundred sixty-one".