12888397517 has 2 divisors, whose sum is σ = 12888397518. Its totient is φ = 12888397516.

The previous prime is 12888397513. The next prime is 12888397523. The reversal of 12888397517 is 71579388821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10470610276 + 2417787241 = 102326^2 + 49171^2 .

It is a cyclic number.

It is not a de Polignac number, because 12888397517 - 2² = 12888397513 is a prime.

It is a super-2 number, since 2×12888397517² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12888397513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6444198758 + 6444198759.

It is an arithmetic number, because the mean of its divisors is an integer number (6444198759).

Almost surely, 2^12888397517 is an apocalyptic number.

It is an amenable number.

12888397517 is a deficient number, since it is larger than the sum of its proper divisors (1).

12888397517 is an equidigital number, since it uses as much as digits as its factorization.

12888397517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6773760, while the sum is 59.

The spelling of 12888397517 in words is "twelve billion, eight hundred eighty-eight million, three hundred ninety-seven thousand, five hundred seventeen".