1290344243839 has 16 divisors (see below), whose sum is σ = 1518656947200. Its totient is φ = 1073500575264.

The previous prime is 1290344243821. The next prime is 1290344243849. The reversal of 1290344243839 is 9383424430921.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1290344243839 - 2⁵ = 1290344243807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290344243849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19741552 + ... + 19806805.

It is an arithmetic number, because the mean of its divisors is an integer number (94916059200).

Almost surely, 2^{1290344243839} is an apocalyptic number.

1290344243839 is a deficient number, since it is larger than the sum of its proper divisors (228312703361).

1290344243839 is an equidigital number, since it uses as much as digits as its factorization.

1290344243839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39548502.

The product of its (nonzero) digits is 4478976, while the sum is 52.

The spelling of 1290344243839 in words is "one trillion, two hundred ninety billion, three hundred forty-four million, two hundred forty-three thousand, eight hundred thirty-nine".