8536644864 has 432 divisors, whose sum is σ = 28381348800. Its totient is φ = 2528317440.

The previous prime is 8536644859. The next prime is 8536644899. The reversal of 8536644864 is 4684466358.

8536644864 is a `hidden beast` number, since 8 + 536 + 6 + 4 + 48 + 64 = 666.

It is a tau number, because it is divible by the number of its divisors (432).

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 self number, because there is not a number n which added to its sum of digits gives 8536644864.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 49344682 + ... + 49344854.

Almost surely, 2^8536644864 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 8536644864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14190674400).

8536644864 is an abundant number, since it is smaller than the sum of its proper divisors (19844703936).

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

8536644864 is a wasteful number, since it uses less digits than its factorization.

8536644864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279 (or 248 counting only the distinct ones).

The product of its digits is 13271040, while the sum is 54.

The square root of 8536644864 is about 92393.9655172349. The cubic root of 8536644864 is about 2043.7561248196.

The spelling of 8536644864 in words is "eight billion, five hundred thirty-six million, six hundred forty-four thousand, eight hundred sixty-four".