12511333513 has 32 divisors (see below), whose sum is σ = 15043136000. Its totient is φ = 10393572672.

The previous prime is 12511333511. The next prime is 12511333543. The reversal of 12511333513 is 31533311521.

It is a happy number.

It is not a de Polignac number, because 12511333513 - 2¹ = 12511333511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12511333511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3513628 + ... + 3517186.

It is an arithmetic number, because the mean of its divisors is an integer number (470098000).

Almost surely, 2^12511333513 is an apocalyptic number.

It is an amenable number.

12511333513 is a deficient number, since it is larger than the sum of its proper divisors (2531802487).

12511333513 is an equidigital number, since it uses as much as digits as its factorization.

12511333513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3894 (or 3880 counting only the distinct ones).

The product of its digits is 4050, while the sum is 28.

The spelling of 12511333513 in words is "twelve billion, five hundred eleven million, three hundred thirty-three thousand, five hundred thirteen".