1159318494181 has 4 divisors (see below), whose sum is σ = 1159327040652. Its totient is φ = 1159309947712.

The previous prime is 1159318494179. The next prime is 1159318494223. The reversal of 1159318494181 is 1814948139511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 133977960900 + 1025340533281 = 366030^2 + 1012591^2 .

It is a cyclic number.

It is not a de Polignac number, because 1159318494181 - 2¹ = 1159318494179 is a prime.

It is a super-2 number, since 2×1159318494181² (a number of 25 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 (1159318434181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4066426 + ... + 4342171.

It is an arithmetic number, because the mean of its divisors is an integer number (289831760163).

Almost surely, 2^{1159318494181} is an apocalyptic number.

It is an amenable number.

1159318494181 is a deficient number, since it is larger than the sum of its proper divisors (8546471).

1159318494181 is an equidigital number, since it uses as much as digits as its factorization.

1159318494181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8546470.

The product of its digits is 1244160, while the sum is 55.

The spelling of 1159318494181 in words is "one trillion, one hundred fifty-nine billion, three hundred eighteen million, four hundred ninety-four thousand, one hundred eighty-one".