1326639880739 has 2 divisors, whose sum is σ = 1326639880740. Its totient is φ = 1326639880738.

The previous prime is 1326639880733. The next prime is 1326639880747. The reversal of 1326639880739 is 9370889366231.

It is a weak prime.

It is an emirp because it is prime and its reverse (9370889366231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1326639880739 - 2²⁴ = 1326623103523 is a prime.

It is a super-2 number, since 2×1326639880739² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1326639880733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663319940369 + 663319940370.

It is an arithmetic number, because the mean of its divisors is an integer number (663319940370).

Almost surely, 2^{1326639880739} is an apocalyptic number.

1326639880739 is a deficient number, since it is larger than the sum of its proper divisors (1).

1326639880739 is an equidigital number, since it uses as much as digits as its factorization.

1326639880739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70543872, while the sum is 65.

The spelling of 1326639880739 in words is "one trillion, three hundred twenty-six billion, six hundred thirty-nine million, eight hundred eighty thousand, seven hundred thirty-nine".