13123311515340 has 144 divisors (see below), whose sum is σ = 40075517260800. Its totient is φ = 3207113305344.

The previous prime is 13123311515261. The next prime is 13123311515341. The reversal of 13123311515340 is 4351511332131.

It is not an unprimeable number, because it can be changed into a prime (13123311515341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3245980 + ... + 6064899.

It is an arithmetic number, because the mean of its divisors is an integer number (278302203200).

Almost surely, 2^{13123311515340} is an apocalyptic number.

13123311515340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13123311515340 is an abundant number, since it is smaller than the sum of its proper divisors (26952205745460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13123311515340 is a wasteful number, since it uses less digits than its factorization.

13123311515340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9311056 (or 9311041 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 33.

Adding to 13123311515340 its reverse (4351511332131), we get a palindrome (17474822847471).

The spelling of 13123311515340 in words is "thirteen trillion, one hundred twenty-three billion, three hundred eleven million, five hundred fifteen thousand, three hundred forty".