8639454816 has 96 divisors (see below), whose sum is σ = 25509708000. Its totient is φ = 2879794944.

The previous prime is 8639454809. The next prime is 8639454853. The reversal of 8639454816 is 6184549368.

8639454816 is a `hidden beast` number, since 8 + 6 + 3 + 94 + 548 + 1 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8260 + ... + 131708.

It is an arithmetic number, because the mean of its divisors is an integer number (265726125).

Almost surely, 2^8639454816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8639454816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12754854000).

8639454816 is an abundant number, since it is smaller than the sum of its proper divisors (16870253184).

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

8639454816 is an equidigital number, since it uses as much as digits as its factorization.

8639454816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123480 (or 123454 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The square root of 8639454816 is about 92948.6676397247. The cubic root of 8639454816 is about 2051.9279753113.

The spelling of 8639454816 in words is "eight billion, six hundred thirty-nine million, four hundred fifty-four thousand, eight hundred sixteen".