8421686861248 has 56 divisors (see below), whose sum is σ = 16722991689840. Its totient is φ = 4208020776960.

The previous prime is 8421686861221. The next prime is 8421686861249.

8421686861248 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a self number, because there is not a number n which added to its sum of digits gives 8421686861248.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8421686861249) 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 7 ways as a sum of consecutive naturals, for example, 869195988 + ... + 869205676.

Almost surely, 2^{8421686861248} is an apocalyptic number.

It is an amenable number.

8421686861248 is a deficient number, since it is larger than the sum of its proper divisors (8301304828592).

8421686861248 is a wasteful number, since it uses less digits than its factorization.

8421686861248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17405 (or 17395 counting only the distinct ones).

The product of its digits is 56623104, while the sum is 64.

The spelling of 8421686861248 in words is "eight trillion, four hundred twenty-one billion, six hundred eighty-six million, eight hundred sixty-one thousand, two hundred forty-eight".