11939525543 has 4 divisors (see below), whose sum is σ = 13024936968. Its totient is φ = 10854114120.

The previous prime is 11939525497. The next prime is 11939525569. The reversal of 11939525543 is 34552593911.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11939525543 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 (11939525593) 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, 542705696 + ... + 542705717.

It is an arithmetic number, because the mean of its divisors is an integer number (3256234242).

Almost surely, 2^11939525543 is an apocalyptic number.

11939525543 is a deficient number, since it is larger than the sum of its proper divisors (1085411425).

11939525543 is a wasteful number, since it uses less digits than its factorization.

11939525543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085411424.

The product of its digits is 729000, while the sum is 47.

The spelling of 11939525543 in words is "eleven billion, nine hundred thirty-nine million, five hundred twenty-five thousand, five hundred forty-three".