12311115545 has 8 divisors (see below), whose sum is σ = 14793334080. Its totient is φ = 9835562160.

The previous prime is 12311115527. The next prime is 12311115581. The reversal of 12311115545 is 54551111321.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12311115545 - 2¹⁰ = 12311114521 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1662221 + ... + 1669610.

It is an arithmetic number, because the mean of its divisors is an integer number (1849166760).

Almost surely, 2^12311115545 is an apocalyptic number.

It is an amenable number.

12311115545 is a deficient number, since it is larger than the sum of its proper divisors (2482218535).

12311115545 is an equidigital number, since it uses as much as digits as its factorization.

12311115545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3332575.

The product of its digits is 3000, while the sum is 29.

Adding to 12311115545 its reverse (54551111321), we get a palindrome (66862226866).

The spelling of 12311115545 in words is "twelve billion, three hundred eleven million, one hundred fifteen thousand, five hundred forty-five".