8161538671 has 16 divisors (see below), whose sum is σ = 9897689088. Its totient is φ = 6627909600.

The previous prime is 8161538657. The next prime is 8161538681. The reversal of 8161538671 is 1768351618.

It is not a de Polignac number, because 8161538671 - 2⁵ = 8161538639 is a prime.

It is a super-2 number, since 2×8161538671² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8161538611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 916111 + ... + 924976.

It is an arithmetic number, because the mean of its divisors is an integer number (618605568).

Almost surely, 2^8161538671 is an apocalyptic number.

8161538671 is a deficient number, since it is larger than the sum of its proper divisors (1736150417).

8161538671 is a wasteful number, since it uses less digits than its factorization.

8161538671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841142.

The product of its digits is 241920, while the sum is 46.

The square root of 8161538671 is about 90341.2346107800. The cubic root of 8161538671 is about 2013.3719521128.

The spelling of 8161538671 in words is "eight billion, one hundred sixty-one million, five hundred thirty-eight thousand, six hundred seventy-one".