9999434052511 has 2 divisors, whose sum is σ = 9999434052512. Its totient is φ = 9999434052510.

The previous prime is 9999434052481. The next prime is 9999434052523. The reversal of 9999434052511 is 1152504349999.

It is a strong prime.

It is an emirp because it is prime and its reverse (1152504349999) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9999434052511 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9999434052511.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9999434052551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999717026255 + 4999717026256.

It is an arithmetic number, because the mean of its divisors is an integer number (4999717026256).

Almost surely, 2^{9999434052511} is an apocalyptic number.

9999434052511 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999434052511 is an equidigital number, since it uses as much as digits as its factorization.

9999434052511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15746400, while the sum is 61.

The spelling of 9999434052511 in words is "nine trillion, nine hundred ninety-nine billion, four hundred thirty-four million, fifty-two thousand, five hundred eleven".