1161411369181 has 4 divisors (see below), whose sum is σ = 1327327279072. Its totient is φ = 995495459292.

The previous prime is 1161411369143. The next prime is 1161411369203. The reversal of 1161411369181 is 1819631141611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1161411369181 - 2¹⁷ = 1161411238109 is a prime.

It is a super-2 number, since 2×1161411369181² (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 (1161411369281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82957954935 + ... + 82957954948.

It is an arithmetic number, because the mean of its divisors is an integer number (331831819768).

Almost surely, 2^{1161411369181} is an apocalyptic number.

It is an amenable number.

1161411369181 is a deficient number, since it is larger than the sum of its proper divisors (165915909891).

1161411369181 is an equidigital number, since it uses as much as digits as its factorization.

1161411369181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165915909890.

The product of its digits is 31104, while the sum is 43.

The spelling of 1161411369181 in words is "one trillion, one hundred sixty-one billion, four hundred eleven million, three hundred sixty-nine thousand, one hundred eighty-one".