13440311312 has 20 divisors (see below), whose sum is σ = 26074489980. Its totient is φ = 6711410688.

The previous prime is 13440311281. The next prime is 13440311323. The reversal of 13440311312 is 21311304431.

It can be written as a sum of positive squares in 2 ways, for example, as 4969686016 + 8470625296 = 70496^2 + 92036^2 .

It is a super-2 number, since 2×13440311312² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533873 + ... + 558480.

It is an arithmetic number, because the mean of its divisors is an integer number (1303724499).

Almost surely, 2^13440311312 is an apocalyptic number.

It is an amenable number.

13440311312 is a deficient number, since it is larger than the sum of its proper divisors (12634178668).

13440311312 is a wasteful number, since it uses less digits than its factorization.

13440311312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093130 (or 1093124 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 13440311312 its reverse (21311304431), we get a palindrome (34751615743).

The spelling of 13440311312 in words is "thirteen billion, four hundred forty million, three hundred eleven thousand, three hundred twelve".