13111444451 has 12 divisors (see below), whose sum is σ = 15744093120. Its totient is φ = 10875851280.

The previous prime is 13111444439. The next prime is 13111444453. The reversal of 13111444451 is 15444411131.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-13111444451 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13111444453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4314296 + ... + 4317333.

It is an arithmetic number, because the mean of its divisors is an integer number (1312007760).

Almost surely, 2^13111444451 is an apocalyptic number.

13111444451 is a deficient number, since it is larger than the sum of its proper divisors (2632648669).

13111444451 is an equidigital number, since it uses as much as digits as its factorization.

13111444451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8631674 (or 8631667 counting only the distinct ones).

The product of its digits is 3840, while the sum is 29.

Adding to 13111444451 its reverse (15444411131), we get a palindrome (28555855582).

The spelling of 13111444451 in words is "thirteen billion, one hundred eleven million, four hundred forty-four thousand, four hundred fifty-one".