12511317015 has 24 divisors (see below), whose sum is σ = 22629166560. Its totient is φ = 6382584384.

The previous prime is 12511316999. The next prime is 12511317019. The reversal of 12511317015 is 51071311521.

It is not a de Polignac number, because 12511317015 - 2⁴ = 12511316999 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12511317015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12511317019) 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 23 ways as a sum of consecutive naturals, for example, 6043080 + ... + 6045149.

It is an arithmetic number, because the mean of its divisors is an integer number (942881940).

Almost surely, 2^12511317015 is an apocalyptic number.

12511317015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12511317015 is a deficient number, since it is larger than the sum of its proper divisors (10117849545).

12511317015 is a wasteful number, since it uses less digits than its factorization.

12511317015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12088263 (or 12088260 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 27.

Adding to 12511317015 its reverse (51071311521), we get a palindrome (63582628536).

The spelling of 12511317015 in words is "twelve billion, five hundred eleven million, three hundred seventeen thousand, fifteen".