9975115511 has 2 divisors, whose sum is σ = 9975115512. Its totient is φ = 9975115510.

The previous prime is 9975115499. The next prime is 9975115523. The reversal of 9975115511 is 1155115799.

9975115511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (9975115499) and next prime (9975115523).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9975115511 is a prime.

It is a super-2 number, since 2×9975115511² (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 (9975118511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4987557755 + 4987557756.

It is an arithmetic number, because the mean of its divisors is an integer number (4987557756).

Almost surely, 2^9975115511 is an apocalyptic number.

9975115511 is a deficient number, since it is larger than the sum of its proper divisors (1).

9975115511 is an equidigital number, since it uses as much as digits as its factorization.

9975115511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70875, while the sum is 44.

The square root of 9975115511 is about 99875.5000538170. The cubic root of 9975115511 is about 2152.6461387595.

The spelling of 9975115511 in words is "nine billion, nine hundred seventy-five million, one hundred fifteen thousand, five hundred eleven".