3111981797189 has 4 divisors (see below), whose sum is σ = 3112080474624. Its totient is φ = 3111883119756.

The previous prime is 3111981797149. The next prime is 3111981797213. The reversal of 3111981797189 is 9817971891113.

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 3111981797189 - 2⁸ = 3111981796933 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 (3111981797149) 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, 49291397 + ... + 49354490.

It is an arithmetic number, because the mean of its divisors is an integer number (778020118656).

Almost surely, 2^{3111981797189} is an apocalyptic number.

It is an amenable number.

3111981797189 is a deficient number, since it is larger than the sum of its proper divisors (98677435).

3111981797189 is an equidigital number, since it uses as much as digits as its factorization.

3111981797189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98677434.

The product of its digits is 6858432, while the sum is 65.

The spelling of 3111981797189 in words is "three trillion, one hundred eleven billion, nine hundred eighty-one million, seven hundred ninety-seven thousand, one hundred eighty-nine".