3864673815631 has 4 divisors (see below), whose sum is σ = 3880843999200. Its totient is φ = 3848503632064.

The previous prime is 3864673815617. The next prime is 3864673815661. The reversal of 3864673815631 is 1365183764683.

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 3864673815631 - 2¹⁹ = 3864673291343 is a prime.

It is a super-2 number, since 2×3864673815631² (a number of 26 digits) contains 22 as substring.

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 3864673815631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3864673815601) 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, 8085091426 + ... + 8085091903.

It is an arithmetic number, because the mean of its divisors is an integer number (970210999800).

Almost surely, 2^{3864673815631} is an apocalyptic number.

3864673815631 is a deficient number, since it is larger than the sum of its proper divisors (16170183569).

3864673815631 is a wasteful number, since it uses less digits than its factorization.

3864673815631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16170183568.

The product of its digits is 52254720, while the sum is 61.

The spelling of 3864673815631 in words is "three trillion, eight hundred sixty-four billion, six hundred seventy-three million, eight hundred fifteen thousand, six hundred thirty-one".