12763887515 has 4 divisors (see below), whose sum is σ = 15316665024. Its totient is φ = 10211110008.

The previous prime is 12763887511. The next prime is 12763887533. The reversal of 12763887515 is 51578836721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51578836721 = 107 ⋅482045203.

It is a cyclic number.

It is not a de Polignac number, because 12763887515 - 2² = 12763887511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12763887511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1276388747 + ... + 1276388756.

It is an arithmetic number, because the mean of its divisors is an integer number (3829166256).

Almost surely, 2^12763887515 is an apocalyptic number.

12763887515 is a deficient number, since it is larger than the sum of its proper divisors (2552777509).

12763887515 is an equidigital number, since it uses as much as digits as its factorization.

12763887515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2552777508.

The product of its digits is 2822400, while the sum is 53.

The spelling of 12763887515 in words is "twelve billion, seven hundred sixty-three million, eight hundred eighty-seven thousand, five hundred fifteen".