7216956864 has 168 divisors, whose sum is σ = 22455713280. Its totient is φ = 2202826752.

The previous prime is 7216956863. The next prime is 7216956889. The reversal of 7216956864 is 4686596127.

7216956864 is a `hidden beast` number, since 7 + 2 + 16 + 9 + 568 + 64 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 7216956864.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7216956863) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 947182 + ... + 954770.

It is an arithmetic number, because the mean of its divisors is an integer number (133664960).

Almost surely, 2^7216956864 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 7216956864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11227856640).

7216956864 is an abundant number, since it is smaller than the sum of its proper divisors (15238756416).

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

7216956864 is a wasteful number, since it uses less digits than its factorization.

7216956864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7747 (or 7734 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 7216956864 is about 84952.6742604375. The cubic root of 7216956864 is about 1932.4934763002.

The spelling of 7216956864 in words is "seven billion, two hundred sixteen million, nine hundred fifty-six thousand, eight hundred sixty-four".