8163071837881 has 27 divisors (see below), whose sum is σ = 8564564566831. Its totient is φ = 7780067805104.

The previous prime is 8163071837827. The next prime is 8163071837911. The reversal of 8163071837881 is 1887381703618.

The square root of 8163071837881 is 2857109.

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

It can be written as a sum of positive squares in only one way, i.e., 4280516861481 + 3882554976400 = 2068941^2 + 1970420^2 .

It is not a de Polignac number, because 8163071837881 - 2¹⁵ = 8163071805113 is a prime.

It is a super-2 number, since 2×8163071837881² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8163071837801) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 6877060770 + ... + 6877061956.

Almost surely, 2^{8163071837881} is an apocalyptic number.

8163071837881 is the 2857109-th square number.

8163071837881 is the 1428555-th centered octagonal number.

It is an amenable number.

8163071837881 is a deficient number, since it is larger than the sum of its proper divisors (401492728950).

8163071837881 is an frugal number, since it uses more digits than its factorization.

8163071837881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2598 (or 1299 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 61.

The spelling of 8163071837881 in words is "eight trillion, one hundred sixty-three billion, seventy-one million, eight hundred thirty-seven thousand, eight hundred eighty-one".