1164161155369 has 9 divisors (see below), whose sum is σ = 1166447641687. Its totient is φ = 1161879148624.

The previous prime is 1164161155331. The next prime is 1164161155379. The reversal of 1164161155369 is 9635511614611.

The square root of 1164161155369 is 1078963.

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., 1078845755625 + 85315399744 = 1038675^2 + 292088^2 .

It is not a de Polignac number, because 1164161155369 - 2²⁷ = 1164026937641 is a prime.

It is a super-2 number, since 2×1164161155369² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1164161155319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 924670662 + ... + 924671920.

Almost surely, 2^{1164161155369} is an apocalyptic number.

1164161155369 is the 1078963-rd square number.

1164161155369 is the 539482-nd centered octagonal number.

It is an amenable number.

1164161155369 is a deficient number, since it is larger than the sum of its proper divisors (2286486318).

1164161155369 is an frugal number, since it uses more digits than its factorization.

1164161155369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4232 (or 2116 counting only the distinct ones).

The product of its digits is 583200, while the sum is 49.

Multiplying 1164161155369 by its sum of digits (49), we get a square (57043896613081 = 7552741²).

The spelling of 1164161155369 in words is "one trillion, one hundred sixty-four billion, one hundred sixty-one million, one hundred fifty-five thousand, three hundred sixty-nine".