6539381629 has 16 divisors (see below), whose sum is σ = 7197946560. Its totient is φ = 5891650560.

The previous prime is 6539381617. The next prime is 6539381663. The reversal of 6539381629 is 9261839356.

It is a cyclic number.

It is not a de Polignac number, because 6539381629 - 2³¹ = 4391897981 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 (6531381629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 933789 + ... + 940765.

It is an arithmetic number, because the mean of its divisors is an integer number (449871660).

Almost surely, 2^6539381629 is an apocalyptic number.

It is an amenable number.

6539381629 is a deficient number, since it is larger than the sum of its proper divisors (658564931).

6539381629 is a wasteful number, since it uses less digits than its factorization.

6539381629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7740.

The product of its digits is 2099520, while the sum is 52.

The square root of 6539381629 is about 80866.4431578390. The cubic root of 6539381629 is about 1870.0170272121.

The spelling of 6539381629 in words is "six billion, five hundred thirty-nine million, three hundred eighty-one thousand, six hundred twenty-nine".