8811389161 has 27 divisors (see below), whose sum is σ = 9431279991. Its totient is φ = 8231935824.

The previous prime is 8811389131. The next prime is 8811389173. The reversal of 8811389161 is 1619831188.

The square root of 8811389161 is 93869.

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., 7884552025 + 926837136 = 88795^2 + 30444^2 .

It is not a de Polignac number, because 8811389161 - 2¹⁷ = 8811258089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8811389131) 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, 149345550 + ... + 149345608.

Almost surely, 2^8811389161 is an apocalyptic number.

8811389161 is the 93869-th square number.

8811389161 is the 46935-th centered octagonal number.

It is an amenable number.

8811389161 is a deficient number, since it is larger than the sum of its proper divisors (619890830).

8811389161 is an frugal number, since it uses more digits than its factorization.

8811389161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 139 counting only the distinct ones).

The product of its digits is 82944, while the sum is 46.

The cubic root of 8811389161 is about 2065.4505139507.

Multiplying 8811389161 by its product of digits (82944), we get a square (730851862569984 = 27034272²).

The spelling of 8811389161 in words is "eight billion, eight hundred eleven million, three hundred eighty-nine thousand, one hundred sixty-one".