11947980441 has 4 divisors (see below), whose sum is σ = 15930640592. Its totient is φ = 7965320292.

The previous prime is 11947980433. The next prime is 11947980479. The reversal of 11947980441 is 14408974911.

It is a happy number.

11947980441 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: 14408974911 = 3 ⋅4802991637.

It is not a de Polignac number, because 11947980441 - 2³ = 11947980433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11937980441) 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, 1991330071 + ... + 1991330076.

It is an arithmetic number, because the mean of its divisors is an integer number (3982660148).

Almost surely, 2^11947980441 is an apocalyptic number.

It is an amenable number.

11947980441 is a deficient number, since it is larger than the sum of its proper divisors (3982660151).

11947980441 is an equidigital number, since it uses as much as digits as its factorization.

11947980441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3982660150.

The product of its (nonzero) digits is 290304, while the sum is 48.

The spelling of 11947980441 in words is "eleven billion, nine hundred forty-seven million, nine hundred eighty thousand, four hundred forty-one".