1278063808633 has 2 divisors, whose sum is σ = 1278063808634. Its totient is φ = 1278063808632.

The previous prime is 1278063808603. The next prime is 1278063808661. The reversal of 1278063808633 is 3368083608721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1220335577344 + 57728231289 = 1104688^2 + 240267^2 .

It is a cyclic number.

It is not a de Polignac number, because 1278063808633 - 2³³ = 1269473874041 is a prime.

It is not a weakly prime, because it can be changed into another prime (1278063808603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639031904316 + 639031904317.

It is an arithmetic number, because the mean of its divisors is an integer number (639031904317).

Almost surely, 2^{1278063808633} is an apocalyptic number.

It is an amenable number.

1278063808633 is a deficient number, since it is larger than the sum of its proper divisors (1).

1278063808633 is an equidigital number, since it uses as much as digits as its factorization.

1278063808633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6967296, while the sum is 55.

The spelling of 1278063808633 in words is "one trillion, two hundred seventy-eight billion, sixty-three million, eight hundred eight thousand, six hundred thirty-three".