11542731545 has 4 divisors (see below), whose sum is σ = 13851277860. Its totient is φ = 9234185232.

The previous prime is 11542731523. The next prime is 11542731559. The reversal of 11542731545 is 54513724511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7688308489 + 3854423056 = 87683^2 + 62084^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11542731545 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11542731499 and 11542731508.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1154273150 + ... + 1154273159.

It is an arithmetic number, because the mean of its divisors is an integer number (3462819465).

Almost surely, 2^11542731545 is an apocalyptic number.

It is an amenable number.

11542731545 is a deficient number, since it is larger than the sum of its proper divisors (2308546315).

11542731545 is an equidigital number, since it uses as much as digits as its factorization.

11542731545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2308546314.

The product of its digits is 84000, while the sum is 38.

The spelling of 11542731545 in words is "eleven billion, five hundred forty-two million, seven hundred thirty-one thousand, five hundred forty-five".