8642031211631 has 4 divisors (see below), whose sum is σ = 8642137527000. Its totient is φ = 8641924896264.

The previous prime is 8642031211621. The next prime is 8642031211633. The reversal of 8642031211631 is 1361121302468.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8642031211631 is a prime.

It is a super-2 number, since 2×8642031211631² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8642031211633) 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, 53035661 + ... + 53198358.

It is an arithmetic number, because the mean of its divisors is an integer number (2160534381750).

Almost surely, 2^{8642031211631} is an apocalyptic number.

8642031211631 is a deficient number, since it is larger than the sum of its proper divisors (106315369).

8642031211631 is a wasteful number, since it uses less digits than its factorization.

8642031211631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106315368.

The product of its (nonzero) digits is 41472, while the sum is 38.

The spelling of 8642031211631 in words is "eight trillion, six hundred forty-two billion, thirty-one million, two hundred eleven thousand, six hundred thirty-one".