13028978747329 has 2 divisors, whose sum is σ = 13028978747330. Its totient is φ = 13028978747328.

The previous prime is 13028978747273. The next prime is 13028978747357. The reversal of 13028978747329 is 92374787982031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12596110810000 + 432867937329 = 3549100^2 + 657927^2 .

It is a cyclic number.

It is not a de Polignac number, because 13028978747329 - 2¹¹ = 13028978745281 is a prime.

It is not a weakly prime, because it can be changed into another prime (13028978747359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6514489373664 + 6514489373665.

It is an arithmetic number, because the mean of its divisors is an integer number (6514489373665).

Almost surely, 2^{13028978747329} is an apocalyptic number.

It is an amenable number.

13028978747329 is a deficient number, since it is larger than the sum of its proper divisors (1).

13028978747329 is an equidigital number, since it uses as much as digits as its factorization.

13028978747329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256048128, while the sum is 70.

The spelling of 13028978747329 in words is "thirteen trillion, twenty-eight billion, nine hundred seventy-eight million, seven hundred forty-seven thousand, three hundred twenty-nine".