8381621064 has 64 divisors (see below), whose sum is σ = 22032072000. Its totient is φ = 2653297920.

The previous prime is 8381621041. The next prime is 8381621077. The reversal of 8381621064 is 4601261838.

It is a super-3 number, since 3×8381621064³ (a number of 31 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56254 + ... + 141165.

It is an arithmetic number, because the mean of its divisors is an integer number (344251125).

Almost surely, 2^8381621064 is an apocalyptic number.

It is an amenable number.

8381621064 is an abundant number, since it is smaller than the sum of its proper divisors (13650450936).

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

8381621064 is a wasteful number, since it uses less digits than its factorization.

8381621064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197518 (or 197514 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 8381621064 is about 91551.1936787282. The cubic root of 8381621064 is about 2031.3090688571.

The spelling of 8381621064 in words is "eight billion, three hundred eighty-one million, six hundred twenty-one thousand, sixty-four".