9999508215839 has 2 divisors, whose sum is σ = 9999508215840. Its totient is φ = 9999508215838.

The previous prime is 9999508215793. The next prime is 9999508215869. The reversal of 9999508215839 is 9385128059999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9999508215839 - 2¹² = 9999508211743 is a prime.

It is a super-2 number, since 2×9999508215839² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9999508215839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9999508215869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999754107919 + 4999754107920.

It is an arithmetic number, because the mean of its divisors is an integer number (4999754107920).

Almost surely, 2^{9999508215839} is an apocalyptic number.

9999508215839 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999508215839 is an equidigital number, since it uses as much as digits as its factorization.

9999508215839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 566870400, while the sum is 77.

The spelling of 9999508215839 in words is "nine trillion, nine hundred ninety-nine billion, five hundred eight million, two hundred fifteen thousand, eight hundred thirty-nine".