3686440446863 has 4 divisors (see below), whose sum is σ = 3686444838648. Its totient is φ = 3686436055080.

The previous prime is 3686440446853. The next prime is 3686440446883.

3686440446863 is nontrivially palindromic in base 10.

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 3686440446863 - 2¹⁸ = 3686440184719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3686440446796 and 3686440446805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3686440446823) 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, 500453 + ... + 2761038.

It is an arithmetic number, because the mean of its divisors is an integer number (921611209662).

Almost surely, 2^{3686440446863} is an apocalyptic number.

3686440446863 is a deficient number, since it is larger than the sum of its proper divisors (4391785).

3686440446863 is a wasteful number, since it uses less digits than its factorization.

3686440446863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4391784.

The product of its (nonzero) digits is 191102976, while the sum is 62.

The spelling of 3686440446863 in words is "three trillion, six hundred eighty-six billion, four hundred forty million, four hundred forty-six thousand, eight hundred sixty-three".