16159240161 has 9 divisors (see below), whose sum is σ = 23341675539. Its totient is φ = 10772572536.

The previous prime is 16159240147. The next prime is 16159240183. The reversal of 16159240161 is 16104295161.

The square root of 16159240161 is 127119.

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

16159240161 is a `hidden beast` number, since 1 + 6 + 1 + 592 + 4 + 0 + 1 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 920819025 + 15238421136 = 30345^2 + 123444^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 16159240161 - 2⁷ = 16159240033 is a prime.

It is a super-2 number, since 2×16159240161² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16159240121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 360171 + ... + 402543.

Almost surely, 2^16159240161 is an apocalyptic number.

16159240161 is the 127119-th square number.

16159240161 is the 63560-th centered octagonal number.

It is an amenable number.

16159240161 is a deficient number, since it is larger than the sum of its proper divisors (7182435378).

16159240161 is an frugal number, since it uses more digits than its factorization.

16159240161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84752 (or 42376 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

Multiplying 16159240161 by its sum of digits (36), we get a square (581732645796 = 762714²).

The spelling of 16159240161 in words is "sixteen billion, one hundred fifty-nine million, two hundred forty thousand, one hundred sixty-one".