9999939810479 has 2 divisors, whose sum is σ = 9999939810480. Its totient is φ = 9999939810478.

The previous prime is 9999939810461. The next prime is 9999939810527. The reversal of 9999939810479 is 9740189399999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9999939810479 - 2¹² = 9999939806383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9999939810479.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9999939510479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999969905239 + 4999969905240.

It is an arithmetic number, because the mean of its divisors is an integer number (4999969905240).

Almost surely, 2^{9999939810479} is an apocalyptic number.

9999939810479 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999939810479 is an equidigital number, since it uses as much as digits as its factorization.

9999939810479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3214155168, while the sum is 86.

The spelling of 9999939810479 in words is "nine trillion, nine hundred ninety-nine billion, nine hundred thirty-nine million, eight hundred ten thousand, four hundred seventy-nine".