6539491534 has 4 divisors (see below), whose sum is σ = 9809237304. Its totient is φ = 3269745766.

The previous prime is 6539491531. The next prime is 6539491589. The reversal of 6539491534 is 4351949356.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6539491531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1634872882 + ... + 1634872885.

It is an arithmetic number, because the mean of its divisors is an integer number (2452309326).

Almost surely, 2^6539491534 is an apocalyptic number.

6539491534 is a deficient number, since it is larger than the sum of its proper divisors (3269745770).

6539491534 is a wasteful number, since it uses less digits than its factorization.

6539491534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3269745769.

The product of its digits is 1749600, while the sum is 49.

The square root of 6539491534 is about 80867.1227013797. The cubic root of 6539491534 is about 1870.0275033846.

The spelling of 6539491534 in words is "six billion, five hundred thirty-nine million, four hundred ninety-one thousand, five hundred thirty-four".