13111568481 has 16 divisors (see below), whose sum is σ = 19073734848. Its totient is φ = 7945420800.

The previous prime is 13111568453. The next prime is 13111568527. The reversal of 13111568481 is 18486511131.

It is a happy number.

It is not a de Polignac number, because 13111568481 - 2¹⁰ = 13111567457 is a prime.

It is a super-2 number, since 2×13111568481² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13111568581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 316321 + ... + 355361.

It is an arithmetic number, because the mean of its divisors is an integer number (1192108428).

Almost surely, 2^13111568481 is an apocalyptic number.

13111568481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13111568481 is a deficient number, since it is larger than the sum of its proper divisors (5962166367).

13111568481 is a wasteful number, since it uses less digits than its factorization.

13111568481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49232.

The product of its digits is 23040, while the sum is 39.

The spelling of 13111568481 in words is "thirteen billion, one hundred eleven million, five hundred sixty-eight thousand, four hundred eighty-one".