1290542626559 has 2 divisors, whose sum is σ = 1290542626560. Its totient is φ = 1290542626558.

The previous prime is 1290542626543. The next prime is 1290542626577. The reversal of 1290542626559 is 9556262450921.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1290542626559 - 2⁴ = 1290542626543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1290542626459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 645271313279 + 645271313280.

It is an arithmetic number, because the mean of its divisors is an integer number (645271313280).

Almost surely, 2^{1290542626559} is an apocalyptic number.

1290542626559 is a deficient number, since it is larger than the sum of its proper divisors (1).

1290542626559 is an equidigital number, since it uses as much as digits as its factorization.

1290542626559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664000, while the sum is 56.

The spelling of 1290542626559 in words is "one trillion, two hundred ninety billion, five hundred forty-two million, six hundred twenty-six thousand, five hundred fifty-nine".