11443197285 has 24 divisors (see below), whose sum is σ = 21360636024. Its totient is φ = 5633573760.

The previous prime is 11443197257. The next prime is 11443197331. The reversal of 11443197285 is 58279134411.

11443197285 is a `hidden beast` number, since 11 + 44 + 319 + 7 + 285 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 298805796 + 11144391489 = 17286^2 + 105567^2 .

It is not a de Polignac number, because 11443197285 - 2⁵ = 11443197253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11443197285.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9779926 + ... + 9781095.

It is an arithmetic number, because the mean of its divisors is an integer number (890026501).

Almost surely, 2^11443197285 is an apocalyptic number.

11443197285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11443197285 is a deficient number, since it is larger than the sum of its proper divisors (9917438739).

11443197285 is a wasteful number, since it uses less digits than its factorization.

11443197285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19561045 (or 19561042 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The spelling of 11443197285 in words is "eleven billion, four hundred forty-three million, one hundred ninety-seven thousand, two hundred eighty-five".