6539238143 has 4 divisors (see below), whose sum is σ = 6539788200. Its totient is φ = 6538688088.

The previous prime is 6539238137. The next prime is 6539238161. The reversal of 6539238143 is 3418329356.

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

It is a cyclic number.

It is not a de Polignac number, because 6539238143 - 2²² = 6535043839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6539238094 and 6539238103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6539288143) 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, 256793 + ... + 281106.

It is an arithmetic number, because the mean of its divisors is an integer number (1634947050).

Almost surely, 2^6539238143 is an apocalyptic number.

6539238143 is a deficient number, since it is larger than the sum of its proper divisors (550057).

6539238143 is a wasteful number, since it uses less digits than its factorization.

6539238143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550056.

The product of its digits is 466560, while the sum is 44.

The square root of 6539238143 is about 80865.5559740981. Note that the first 3 decimals coincide. The cubic root of 6539238143 is about 1870.0033499135.

The spelling of 6539238143 in words is "six billion, five hundred thirty-nine million, two hundred thirty-eight thousand, one hundred forty-three".