238159712161 has 18 divisors (see below), whose sum is σ = 294298216998. Its totient is φ = 192128832000.

The previous prime is 238159712117. The next prime is 238159712239. The reversal of 238159712161 is 161217951832.

It can be written as a sum of positive squares in 3 ways, for example, as 136681787025 + 101477925136 = 369705^2 + 318556^2 .

It is not a de Polignac number, because 238159712161 - 2²¹ = 238157615009 is a prime.

It is a super-2 number, since 2×238159712161² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238159712101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8394840 + ... + 8423161.

Almost surely, 2^238159712161 is an apocalyptic number.

It is an amenable number.

238159712161 is a deficient number, since it is larger than the sum of its proper divisors (56138504837).

238159712161 is a wasteful number, since it uses less digits than its factorization.

238159712161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16818049 (or 16818025 counting only the distinct ones).

The product of its digits is 181440, while the sum is 46.

The spelling of 238159712161 in words is "two hundred thirty-eight billion, one hundred fifty-nine million, seven hundred twelve thousand, one hundred sixty-one".