11506543045 has 4 divisors (see below), whose sum is σ = 13807851660. Its totient is φ = 9205234432.

The previous prime is 11506543039. The next prime is 11506543049. The reversal of 11506543045 is 54034560511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54034560511 = 1619 ⋅33375269.

It can be written as a sum of positive squares in 2 ways, for example, as 4902380289 + 6604162756 = 70017^2 + 81266^2 .

It is a cyclic number.

It is not a de Polignac number, because 11506543045 - 2⁷ = 11506542917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11506543045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11506543049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1150654300 + ... + 1150654309.

It is an arithmetic number, because the mean of its divisors is an integer number (3451962915).

Almost surely, 2^11506543045 is an apocalyptic number.

It is an amenable number.

11506543045 is a deficient number, since it is larger than the sum of its proper divisors (2301308615).

11506543045 is an equidigital number, since it uses as much as digits as its factorization.

11506543045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2301308614.

The product of its (nonzero) digits is 36000, while the sum is 34.

The spelling of 11506543045 in words is "eleven billion, five hundred six million, five hundred forty-three thousand, forty-five".