6538517387 has 6 divisors (see below), whose sum is σ = 6560995452. Its totient is φ = 6516116072.

The previous prime is 6538517371. The next prime is 6538517431. The reversal of 6538517387 is 7837158356.

It is a happy number.

It is not a de Polignac number, because 6538517387 - 2⁴ = 6538517371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6538517317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 47768 + ... + 123930.

It is an arithmetic number, because the mean of its divisors is an integer number (1093499242).

Almost surely, 2^6538517387 is an apocalyptic number.

6538517387 is a deficient number, since it is larger than the sum of its proper divisors (22478065).

6538517387 is an frugal number, since it uses more digits than its factorization.

6538517387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76749 (or 76456 counting only the distinct ones).

The product of its digits is 4233600, while the sum is 53.

The square root of 6538517387 is about 80861.0993432565. The cubic root of 6538517387 is about 1869.9346433543.

The spelling of 6538517387 in words is "six billion, five hundred thirty-eight million, five hundred seventeen thousand, three hundred eighty-seven".