8220091776 has 128 divisors (see below), whose sum is σ = 23558115840. Its totient is φ = 2524538880.

The previous prime is 8220091741. The next prime is 8220091807. The reversal of 8220091776 is 6771900228.

It is a tau number, because it is divible by the number of its divisors (128).

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, 3448281 + ... + 3450663.

It is an arithmetic number, because the mean of its divisors is an integer number (184047780).

Almost surely, 2^8220091776 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 8220091776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11779057920).

8220091776 is an abundant number, since it is smaller than the sum of its proper divisors (15338024064).

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

8220091776 is a wasteful number, since it uses less digits than its factorization.

8220091776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3104 (or 3092 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 8220091776 is about 90664.7217830618. The cubic root of 8220091776 is about 2018.1753100468.

The spelling of 8220091776 in words is "eight billion, two hundred twenty million, ninety-one thousand, seven hundred seventy-six".