161273323372161 has 48 divisors (see below), whose sum is σ = 290900302781312. Its totient is φ = 77333861341440.

The previous prime is 161273323372159. The next prime is 161273323372169.

161273323372161 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 161273323372161 - 2¹ = 161273323372159 is a prime.

It is a super-2 number, since 2×161273323372161² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161273323372161.

It is not an unprimeable number, because it can be changed into a prime (161273323372169) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2441061076 + ... + 2441127141.

Almost surely, 2^{161273323372161} is an apocalyptic number.

161273323372161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

161273323372161 is a deficient number, since it is larger than the sum of its proper divisors (129626979409151).

161273323372161 is a wasteful number, since it uses less digits than its factorization.

161273323372161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4882188262 (or 4882188251 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 48.

The spelling of 161273323372161 in words is "one hundred sixty-one trillion, two hundred seventy-three billion, three hundred twenty-three million, three hundred seventy-two thousand, one hundred sixty-one".