9999555613 has 2 divisors, whose sum is σ = 9999555614. Its totient is φ = 9999555612.

The previous prime is 9999555551. The next prime is 9999555623. The reversal of 9999555613 is 3165559999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6269155684 + 3730399929 = 79178^2 + 61077^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999555613 - 2¹³ = 9999547421 is a prime.

It is a super-2 number, since 2×9999555613² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9999555623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999777806 + 4999777807.

It is an arithmetic number, because the mean of its divisors is an integer number (4999777807).

Almost surely, 2^9999555613 is an apocalyptic number.

It is an amenable number.

9999555613 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999555613 is an equidigital number, since it uses as much as digits as its factorization.

9999555613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14762250, while the sum is 61.

The square root of 9999555613 is about 99997.7780403145. The cubic root of 9999555613 is about 2154.4027761335.

The spelling of 9999555613 in words is "nine billion, nine hundred ninety-nine million, five hundred fifty-five thousand, six hundred thirteen".