8521423672320 has 528 divisors, whose sum is σ = 32792391731520. Its totient is φ = 2097575460864.

The previous prime is 8521423672301. The next prime is 8521423672327. The reversal of 8521423672320 is 232763241258.

8521423672320 is a `hidden beast` number, since 8 + 5 + 21 + 4 + 236 + 72 + 320 = 666.

It is a super-2 number, since 2×8521423672320² (a number of 27 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8521423672327) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23180187 + ... + 23544933.

Almost surely, 2^{8521423672320} is an apocalyptic number.

8521423672320 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8521423672320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16396195865760).

8521423672320 is an abundant number, since it is smaller than the sum of its proper divisors (24270968059200).

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

8521423672320 is a wasteful number, since it uses less digits than its factorization.

8521423672320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364807 (or 364770 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 45.

The spelling of 8521423672320 in words is "eight trillion, five hundred twenty-one billion, four hundred twenty-three million, six hundred seventy-two thousand, three hundred twenty".