11712969278881 has 4 divisors (see below), whose sum is σ = 12613966915732. Its totient is φ = 10811971642032.

The previous prime is 11712969278867. The next prime is 11712969278887. The reversal of 11712969278881 is 18887296921711.

11712969278881 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.

It can be written as a sum of positive squares in 2 ways, for example, as 1277388206656 + 10435581072225 = 1130216^2 + 3230415^2 .

It is a cyclic number.

It is not a de Polignac number, because 11712969278881 - 2²³ = 11712960890273 is a prime.

It is a super-2 number, since 2×11712969278881² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11712969278881.

It is not an unprimeable number, because it can be changed into a prime (11712969278887) 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, 450498818406 + ... + 450498818431.

It is an arithmetic number, because the mean of its divisors is an integer number (3153491728933).

Almost surely, 2^{11712969278881} is an apocalyptic number.

It is an amenable number.

11712969278881 is a deficient number, since it is larger than the sum of its proper divisors (900997636851).

11712969278881 is an equidigital number, since it uses as much as digits as its factorization.

11712969278881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900997636850.

The product of its digits is 48771072, while the sum is 70.

The spelling of 11712969278881 in words is "eleven trillion, seven hundred twelve billion, nine hundred sixty-nine million, two hundred seventy-eight thousand, eight hundred eighty-one".