8120203776 has 160 divisors (see below), whose sum is σ = 24492093120. Its totient is φ = 2655424512.

The previous prime is 8120203769. The next prime is 8120203781. The reversal of 8120203776 is 6773020218.

8120203776 is a `hidden beast` number, since 81 + 202 + 0 + 377 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 8120203776.

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, 727131 + ... + 738213.

It is an arithmetic number, because the mean of its divisors is an integer number (153075582).

Almost surely, 2^8120203776 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 8120203776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12246046560).

8120203776 is an abundant number, since it is smaller than the sum of its proper divisors (16371889344).

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

8120203776 is a wasteful number, since it uses less digits than its factorization.

8120203776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11163 (or 11141 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 8120203776 is about 90112.1732952879. The cubic root of 8120203776 is about 2009.9672260194.

The spelling of 8120203776 in words is "eight billion, one hundred twenty million, two hundred three thousand, seven hundred seventy-six".