858159524161 has 9 divisors (see below), whose sum is σ = 882015104649. Its totient is φ = 834932674224.

The previous prime is 858159524149. The next prime is 858159524213. The reversal of 858159524161 is 161425951858.

The square root of 858159524161 is 926369.

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

It can be written as a sum of positive squares in 4 ways, for example, as 161669130561 + 696490393600 = 402081^2 + 834560^2 .

It is a de Polignac number, because none of the positive numbers 2^k-858159524161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (858159524861) 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, 34263135 + ... + 34288171.

Almost surely, 2^858159524161 is an apocalyptic number.

858159524161 is the 926369-th square number.

858159524161 is the 463185-th centered octagonal number.

It is an amenable number.

858159524161 is a deficient number, since it is larger than the sum of its proper divisors (23855580488).

858159524161 is an frugal number, since it uses more digits than its factorization.

858159524161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50148 (or 25074 counting only the distinct ones).

The product of its digits is 3456000, while the sum is 55.

The spelling of 858159524161 in words is "eight hundred fifty-eight billion, one hundred fifty-nine million, five hundred twenty-four thousand, one hundred sixty-one".