9985115911 has 2 divisors, whose sum is σ = 9985115912. Its totient is φ = 9985115910.

The previous prime is 9985115893. The next prime is 9985115951. The reversal of 9985115911 is 1195115899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9985115911 - 2¹⁷ = 9984984839 is a prime.

It is a super-2 number, since 2×9985115911² (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 (9985115951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4992557955 + 4992557956.

It is an arithmetic number, because the mean of its divisors is an integer number (4992557956).

Almost surely, 2^9985115911 is an apocalyptic number.

9985115911 is a deficient number, since it is larger than the sum of its proper divisors (1).

9985115911 is an equidigital number, since it uses as much as digits as its factorization.

9985115911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145800, while the sum is 49.

The square root of 9985115911 is about 99925.5518423591. The cubic root of 9985115911 is about 2153.3652660205.

The spelling of 9985115911 in words is "nine billion, nine hundred eighty-five million, one hundred fifteen thousand, nine hundred eleven".