12739953750817 has 2 divisors, whose sum is σ = 12739953750818. Its totient is φ = 12739953750816.

The previous prime is 12739953750779. The next prime is 12739953750847. The reversal of 12739953750817 is 71805735993721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9130120948881 + 3609832801936 = 3021609^2 + 1899956^2 .

It is a cyclic number.

It is not a de Polignac number, because 12739953750817 - 2³¹ = 12737806267169 is a prime.

It is a super-2 number, since 2×12739953750817² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12739953750847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6369976875408 + 6369976875409.

It is an arithmetic number, because the mean of its divisors is an integer number (6369976875409).

Almost surely, 2^{12739953750817} is an apocalyptic number.

It is an amenable number.

12739953750817 is a deficient number, since it is larger than the sum of its proper divisors (1).

12739953750817 is an equidigital number, since it uses as much as digits as its factorization.

12739953750817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100018800, while the sum is 67.

The spelling of 12739953750817 in words is "twelve trillion, seven hundred thirty-nine billion, nine hundred fifty-three million, seven hundred fifty thousand, eight hundred seventeen".