8081776816 has 20 divisors (see below), whose sum is σ = 15684515224. Its totient is φ = 4034160000.

The previous prime is 8081776751. The next prime is 8081776819. The reversal of 8081776816 is 6186771808.

It is not an unprimeable number, because it can be changed into a prime (8081776819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 410610 + ... + 429841.

Almost surely, 2^8081776816 is an apocalyptic number.

It is an amenable number.

8081776816 is a deficient number, since it is larger than the sum of its proper divisors (7602738408).

8081776816 is a wasteful number, since it uses less digits than its factorization.

8081776816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841060 (or 841054 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 52.

The square root of 8081776816 is about 89898.7030829700. The cubic root of 8081776816 is about 2006.7916453373.

The spelling of 8081776816 in words is "eight billion, eighty-one million, seven hundred seventy-six thousand, eight hundred sixteen".