8120885771 has 8 divisors (see below), whose sum is σ = 8635492944. Its totient is φ = 7610379520.

The previous prime is 8120885719. The next prime is 8120885777. The reversal of 8120885771 is 1775880218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8120885771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8120885777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1021145 + ... + 1029066.

It is an arithmetic number, because the mean of its divisors is an integer number (1079436618).

Almost surely, 2^8120885771 is an apocalyptic number.

8120885771 is a deficient number, since it is larger than the sum of its proper divisors (514607173).

8120885771 is a wasteful number, since it uses less digits than its factorization.

8120885771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2050461.

The product of its (nonzero) digits is 250880, while the sum is 47.

The square root of 8120885771 is about 90115.9573605030. The cubic root of 8120885771 is about 2010.0234951009.

The spelling of 8120885771 in words is "eight billion, one hundred twenty million, eight hundred eighty-five thousand, seven hundred seventy-one".