6537998686 has 16 divisors (see below), whose sum is σ = 10930401360. Its totient is φ = 2914773120.

The previous prime is 6537998681. The next prime is 6537998693. The reversal of 6537998686 is 6868997356.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6537998681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5059725 + ... + 5061016.

It is an arithmetic number, because the mean of its divisors is an integer number (683150085).

Almost surely, 2^6537998686 is an apocalyptic number.

6537998686 is a deficient number, since it is larger than the sum of its proper divisors (4392402674).

6537998686 is a wasteful number, since it uses less digits than its factorization.

6537998686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10120779.

The product of its digits is 117573120, while the sum is 67.

The square root of 6537998686 is about 80857.8919215682. The cubic root of 6537998686 is about 1869.8851947020.

The spelling of 6537998686 in words is "six billion, five hundred thirty-seven million, nine hundred ninety-eight thousand, six hundred eighty-six".