1311543505005 has 32 divisors (see below), whose sum is σ = 2100279558144. Its totient is φ = 698886812736.

The previous prime is 1311543505003. The next prime is 1311543505021. The reversal of 1311543505005 is 5005053451131.

It is not a de Polignac number, because 1311543505005 - 2¹ = 1311543505003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311543505003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147975204 + ... + 147984066.

It is an arithmetic number, because the mean of its divisors is an integer number (65633736192).

Almost surely, 2^{1311543505005} is an apocalyptic number.

1311543505005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1311543505005 is a deficient number, since it is larger than the sum of its proper divisors (788736053139).

1311543505005 is a wasteful number, since it uses less digits than its factorization.

1311543505005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16265.

The product of its (nonzero) digits is 22500, while the sum is 33.

Adding to 1311543505005 its reverse (5005053451131), we get a palindrome (6316596956136).

The spelling of 1311543505005 in words is "one trillion, three hundred eleven billion, five hundred forty-three million, five hundred five thousand, five".