1005559989439 has 2 divisors, whose sum is σ = 1005559989440. Its totient is φ = 1005559989438.

The previous prime is 1005559989433. The next prime is 1005559989457. The reversal of 1005559989439 is 9349899555001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1005559989439 - 2¹⁷ = 1005559858367 is a prime.

It is a super-2 number, since 2×1005559989439² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1005559989433) 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, 502779994719 + 502779994720.

It is an arithmetic number, because the mean of its divisors is an integer number (502779994720).

Almost surely, 2^{1005559989439} is an apocalyptic number.

1005559989439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1005559989439 is an equidigital number, since it uses as much as digits as its factorization.

1005559989439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78732000, while the sum is 67.

The spelling of 1005559989439 in words is "one trillion, five billion, five hundred fifty-nine million, nine hundred eighty-nine thousand, four hundred thirty-nine".