7815543216 has 160 divisors (see below), whose sum is σ = 22087961280. Its totient is φ = 2366976000.

The previous prime is 7815543167. The next prime is 7815543247. The reversal of 7815543216 is 6123455187.

It is a happy number.

It is a super-2 number, since 2×7815543216² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16953226 + ... + 16953686.

It is an arithmetic number, because the mean of its divisors is an integer number (138049758).

Almost surely, 2^7815543216 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 7815543216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11043980640).

7815543216 is an abundant number, since it is smaller than the sum of its proper divisors (14272418064).

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

7815543216 is a wasteful number, since it uses less digits than its factorization.

7815543216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855 (or 849 counting only the distinct ones).

The product of its digits is 201600, while the sum is 42.

The square root of 7815543216 is about 88405.5610015569. The cubic root of 7815543216 is about 1984.5089244091.

The spelling of 7815543216 in words is "seven billion, eight hundred fifteen million, five hundred forty-three thousand, two hundred sixteen".