8421659672000 has 56 divisors (see below), whose sum is σ = 20856240197520. Its totient is φ = 3368663865600.

The previous prime is 8421659671991. The next prime is 8421659672093. The reversal of 8421659672000 is 2769561248.

It is a super-2 number, since 2×8421659672000² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a self number, because there is not a number n which added to its sum of digits gives 8421659672000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 526345730 + ... + 526361729.

It is an arithmetic number, because the mean of its divisors is an integer number (372432860670).

Almost surely, 2^{8421659672000} is an apocalyptic number.

8421659672000 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8421659672000 is an abundant number, since it is smaller than the sum of its proper divisors (12434580525520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8421659672000 is a wasteful number, since it uses less digits than its factorization.

8421659672000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052707486 (or 1052707466 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 8421659672000 in words is "eight trillion, four hundred twenty-one billion, six hundred fifty-nine million, six hundred seventy-two thousand".