1256199379339 has 2 divisors, whose sum is σ = 1256199379340. Its totient is φ = 1256199379338.

The previous prime is 1256199379273. The next prime is 1256199379361. The reversal of 1256199379339 is 9339739916521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1256199379339 - 2¹⁷ = 1256199248267 is a prime.

It is not a weakly prime, because it can be changed into another prime (1256199379139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628099689669 + 628099689670.

It is an arithmetic number, because the mean of its divisors is an integer number (628099689670).

Almost surely, 2^{1256199379339} is an apocalyptic number.

1256199379339 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256199379339 is an equidigital number, since it uses as much as digits as its factorization.

1256199379339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 74401740, while the sum is 67.

The spelling of 1256199379339 in words is "one trillion, two hundred fifty-six billion, one hundred ninety-nine million, three hundred seventy-nine thousand, three hundred thirty-nine".