12515348261 has 16 divisors (see below), whose sum is σ = 13533488640. Its totient is φ = 11505231360.

The previous prime is 12515348249. The next prime is 12515348297. The reversal of 12515348261 is 16284351521.

It is a cyclic number.

It is not a de Polignac number, because 12515348261 - 2¹⁰ = 12515347237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12515348761) 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 15 ways as a sum of consecutive naturals, for example, 3769160 + ... + 3772478.

It is an arithmetic number, because the mean of its divisors is an integer number (845843040).

Almost surely, 2^12515348261 is an apocalyptic number.

It is an amenable number.

12515348261 is a deficient number, since it is larger than the sum of its proper divisors (1018140379).

12515348261 is a wasteful number, since it uses less digits than its factorization.

12515348261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4436.

The product of its digits is 57600, while the sum is 38.

Adding to 12515348261 its reverse (16284351521), we get a palindrome (28799699782).

The spelling of 12515348261 in words is "twelve billion, five hundred fifteen million, three hundred forty-eight thousand, two hundred sixty-one".