11545013543 has 4 divisors (see below), whose sum is σ = 13194301200. Its totient is φ = 9895725888.

The previous prime is 11545013533. The next prime is 11545013569. The reversal of 11545013543 is 34531054511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34531054511 = 883 ⋅39106517.

It is a cyclic number.

It is not a de Polignac number, because 11545013543 - 2¹² = 11545009447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11545013533) 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, 824643818 + ... + 824643831.

It is an arithmetic number, because the mean of its divisors is an integer number (3298575300).

Almost surely, 2^11545013543 is an apocalyptic number.

11545013543 is a deficient number, since it is larger than the sum of its proper divisors (1649287657).

11545013543 is an equidigital number, since it uses as much as digits as its factorization.

11545013543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1649287656.

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 11545013543 in words is "eleven billion, five hundred forty-five million, thirteen thousand, five hundred forty-three".