1290078671489 has 2 divisors, whose sum is σ = 1290078671490. Its totient is φ = 1290078671488.

The previous prime is 1290078671473. The next prime is 1290078671507. The reversal of 1290078671489 is 9841768700921.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 785173210000 + 504905461489 = 886100^2 + 710567^2 .

It is a cyclic number.

It is not a de Polignac number, because 1290078671489 - 2⁴ = 1290078671473 is a prime.

It is not a weakly prime, because it can be changed into another prime (1290078671429) 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, 645039335744 + 645039335745.

It is an arithmetic number, because the mean of its divisors is an integer number (645039335745).

Almost surely, 2^{1290078671489} is an apocalyptic number.

It is an amenable number.

1290078671489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1290078671489 is an equidigital number, since it uses as much as digits as its factorization.

1290078671489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12192768, while the sum is 62.

The spelling of 1290078671489 in words is "one trillion, two hundred ninety billion, seventy-eight million, six hundred seventy-one thousand, four hundred eighty-nine".