11986881173 has 4 divisors (see below), whose sum is σ = 11987698080. Its totient is φ = 11986064268.

The previous prime is 11986881149. The next prime is 11986881191. The reversal of 11986881173 is 37118868911.

11986881173 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 37118868911 = 2003 ⋅18531637.

It is a cyclic number.

It is not a de Polignac number, because 11986881173 - 2¹⁴ = 11986864789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11986881113) 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 3 ways as a sum of consecutive naturals, for example, 386033 + ... + 415926.

It is an arithmetic number, because the mean of its divisors is an integer number (2996924520).

Almost surely, 2^11986881173 is an apocalyptic number.

It is an amenable number.

11986881173 is a deficient number, since it is larger than the sum of its proper divisors (816907).

11986881173 is an equidigital number, since it uses as much as digits as its factorization.

11986881173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816906.

The product of its digits is 580608, while the sum is 53.

The spelling of 11986881173 in words is "eleven billion, nine hundred eighty-six million, eight hundred eighty-one thousand, one hundred seventy-three".