1168381560889 has 9 divisors (see below), whose sum is σ = 1210092322413. Its totient is φ = 1128062275872.

The previous prime is 1168381560809. The next prime is 1168381560961. The reversal of 1168381560889 is 9880651838611.

It is a happy number.

The square root of 1168381560889 is 1080917.

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 106879955625 + 1061501605264 = 326925^2 + 1030292^2 .

It is not a de Polignac number, because 1168381560889 - 2¹⁹ = 1168381036601 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1168381560889.

It is not an unprimeable number, because it can be changed into a prime (1168381560809) 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, 31327957 + ... + 31365229.

Almost surely, 2^{1168381560889} is an apocalyptic number.

1168381560889 is the 1080917-th square number.

1168381560889 is the 540459-th centered octagonal number.

It is an amenable number.

1168381560889 is a deficient number, since it is larger than the sum of its proper divisors (41710761524).

1168381560889 is an frugal number, since it uses more digits than its factorization.

1168381560889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74604 (or 37302 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 64.

Multiplying 1168381560889 by its sum of digits (64), we get a square (74776419896896 = 8647336²).

The spelling of 1168381560889 in words is "one trillion, one hundred sixty-eight billion, three hundred eighty-one million, five hundred sixty thousand, eight hundred eighty-nine".