538686358663 has 4 divisors (see below), whose sum is σ = 538687836000. Its totient is φ = 538684881328.

The previous prime is 538686358619. The next prime is 538686358711. The reversal of 538686358663 is 366853686835.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 538686358663 - 2¹⁷ = 538686227591 is a prime.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538686358963) 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, 244338 + ... + 1066336.

It is an arithmetic number, because the mean of its divisors is an integer number (134671959000).

Almost surely, 2^538686358663 is an apocalyptic number.

538686358663 is a deficient number, since it is larger than the sum of its proper divisors (1477337).

538686358663 is an equidigital number, since it uses as much as digits as its factorization.

538686358663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477336.

The product of its digits is 447897600, while the sum is 67.

The spelling of 538686358663 in words is "five hundred thirty-eight billion, six hundred eighty-six million, three hundred fifty-eight thousand, six hundred sixty-three".