5638836305687 has 4 divisors (see below), whose sum is σ = 6072592944600. Its totient is φ = 5205079666776.

The previous prime is 5638836305681. The next prime is 5638836305689. The reversal of 5638836305687 is 7865036388365.

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

It is a cyclic number.

It is not a de Polignac number, because 5638836305687 - 2¹⁶ = 5638836240151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5638836305681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216878319437 + ... + 216878319462.

It is an arithmetic number, because the mean of its divisors is an integer number (1518148236150).

Almost surely, 2^{5638836305687} is an apocalyptic number.

5638836305687 is a deficient number, since it is larger than the sum of its proper divisors (433756638913).

5638836305687 is a wasteful number, since it uses less digits than its factorization.

5638836305687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433756638912.

The product of its (nonzero) digits is 522547200, while the sum is 68.

The spelling of 5638836305687 in words is "five trillion, six hundred thirty-eight billion, eight hundred thirty-six million, three hundred five thousand, six hundred eighty-seven".