8212556544 has 72 divisors (see below), whose sum is σ = 21884470272. Its totient is φ = 2734126080.

The previous prime is 8212556509. The next prime is 8212556563. The reversal of 8212556544 is 4456552128.

It is a junction number, because it is equal to n+sod(n) for n = 8212556496 and 8212556505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 656589 + ... + 668979.

It is an arithmetic number, because the mean of its divisors is an integer number (303950976).

Almost surely, 2^8212556544 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 8212556544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10942235136).

8212556544 is an abundant number, since it is smaller than the sum of its proper divisors (13671913728).

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

8212556544 is a wasteful number, since it uses less digits than its factorization.

8212556544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13273 (or 13259 counting only the distinct ones).

The product of its digits is 384000, while the sum is 42.

The square root of 8212556544 is about 90623.1567757381. The cubic root of 8212556544 is about 2017.5584447383.

The spelling of 8212556544 in words is "eight billion, two hundred twelve million, five hundred fifty-six thousand, five hundred forty-four".