8009856842 has 32 divisors (see below), whose sum is σ = 13536681984. Its totient is φ = 3529929600.

The previous prime is 8009856821. The next prime is 8009856919. The reversal of 8009856842 is 2486589008.

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, 29834 + ... + 130037.

It is an arithmetic number, because the mean of its divisors is an integer number (423021312).

Almost surely, 2^8009856842 is an apocalyptic number.

8009856842 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

8009856842 is a deficient number, since it is larger than the sum of its proper divisors (5526825142).

8009856842 is a wasteful number, since it uses less digits than its factorization.

8009856842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159974.

The product of its (nonzero) digits is 1105920, while the sum is 50.

The square root of 8009856842 is about 89497.8035596405. The cubic root of 8009856842 is about 2000.8210663789.

The spelling of 8009856842 in words is "eight billion, nine million, eight hundred fifty-six thousand, eight hundred forty-two".