12755516321 has 2 divisors, whose sum is σ = 12755516322. Its totient is φ = 12755516320.

The previous prime is 12755516309. The next prime is 12755516351. The reversal of 12755516321 is 12361555721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10521630625 + 2233885696 = 102575^2 + 47264^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12755516321 is a prime.

It is not a weakly prime, because it can be changed into another prime (12755516351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6377758160 + 6377758161.

It is an arithmetic number, because the mean of its divisors is an integer number (6377758161).

Almost surely, 2^12755516321 is an apocalyptic number.

It is an amenable number.

12755516321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12755516321 is an equidigital number, since it uses as much as digits as its factorization.

12755516321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63000, while the sum is 38.

The spelling of 12755516321 in words is "twelve billion, seven hundred fifty-five million, five hundred sixteen thousand, three hundred twenty-one".