9975581523 has 6 divisors (see below), whose sum is σ = 14409173324. Its totient is φ = 6650387676.

The previous prime is 9975581513. The next prime is 9975581537. The reversal of 9975581523 is 3251855799.

9975581523 is a `hidden beast` number, since 9 + 9 + 7 + 5 + 581 + 52 + 3 = 666.

9975581523 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9975581523 - 2⁵ = 9975581491 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9975581523.

It is not an unprimeable number, because it can be changed into a prime (9975581513) 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 in 5 ways as a sum of consecutive naturals, for example, 554198965 + ... + 554198982.

Almost surely, 2^9975581523 is an apocalyptic number.

9975581523 is a deficient number, since it is larger than the sum of its proper divisors (4433591801).

9975581523 is a wasteful number, since it uses less digits than its factorization.

9975581523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108397953 (or 1108397950 counting only the distinct ones).

The product of its digits is 3402000, while the sum is 54.

The square root of 9975581523 is about 99877.8329911097. The cubic root of 9975581523 is about 2152.6796602864.

The spelling of 9975581523 in words is "nine billion, nine hundred seventy-five million, five hundred eighty-one thousand, five hundred twenty-three".