8631538539317 has 4 divisors (see below), whose sum is σ = 8716999317036. Its totient is φ = 8546077761600.

The previous prime is 8631538539313. The next prime is 8631538539359. The reversal of 8631538539317 is 7139358351368.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8455015878001 + 176522661316 = 2907751^2 + 420146^2 .

It is a cyclic number.

It is not a de Polignac number, because 8631538539317 - 2² = 8631538539313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8631538539317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8631538539313) 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, 42730388708 + ... + 42730388909.

It is an arithmetic number, because the mean of its divisors is an integer number (2179249829259).

Almost surely, 2^{8631538539317} is an apocalyptic number.

It is an amenable number.

8631538539317 is a deficient number, since it is larger than the sum of its proper divisors (85460777719).

8631538539317 is a wasteful number, since it uses less digits than its factorization.

8631538539317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85460777718.

The product of its digits is 48988800, while the sum is 62.

The spelling of 8631538539317 in words is "eight trillion, six hundred thirty-one billion, five hundred thirty-eight million, five hundred thirty-nine thousand, three hundred seventeen".