163161361 has 6 divisors (see below), whose sum is σ = 179342786. Its totient is φ = 148328400.

The previous prime is 163161347. The next prime is 163161367.

It is a happy number.

163161361 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 157251600 + 5909761 = 12540^2 + 2431^2 .

It is not a de Polignac number, because 163161361 - 2⁵ = 163161329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163161367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 674100 + ... + 674341.

Almost surely, 2^163161361 is an apocalyptic number.

163161361 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

163161361 is a deficient number, since it is larger than the sum of its proper divisors (16181425).

163161361 is a wasteful number, since it uses less digits than its factorization.

163161361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1348463 (or 1348452 counting only the distinct ones).

The product of its digits is 1944, while the sum is 28.

The square root of 163161361 is about 12773.4631560904. The cubic root of 163161361 is about 546.4357519603.

The spelling of 163161361 in words is "one hundred sixty-three million, one hundred sixty-one thousand, three hundred sixty-one".