9930555550129 has 2 divisors, whose sum is σ = 9930555550130. Its totient is φ = 9930555550128.

The previous prime is 9930555550031. The next prime is 9930555550141. The reversal of 9930555550129 is 9210555550399.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7920554665104 + 2010000885025 = 2814348^2 + 1417745^2 .

It is a cyclic number.

It is not a de Polignac number, because 9930555550129 - 2¹⁹ = 9930555025841 is a prime.

It is not a weakly prime, because it can be changed into another prime (9930555550529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4965277775064 + 4965277775065.

It is an arithmetic number, because the mean of its divisors is an integer number (4965277775065).

Almost surely, 2^{9930555550129} is an apocalyptic number.

It is an amenable number.

9930555550129 is a deficient number, since it is larger than the sum of its proper divisors (1).

9930555550129 is an equidigital number, since it uses as much as digits as its factorization.

9930555550129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13668750, while the sum is 58.

The spelling of 9930555550129 in words is "nine trillion, nine hundred thirty billion, five hundred fifty-five million, five hundred fifty thousand, one hundred twenty-nine".