2179486856 has 32 divisors (see below), whose sum is σ = 4190266080. Its totient is φ = 1062134400.

The previous prime is 2179486847. The next prime is 2179486871. The reversal of 2179486856 is 6586849712.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 420875 + ... + 426021.

It is an arithmetic number, because the mean of its divisors is an integer number (130945815).

Almost surely, 2^2179486856 is an apocalyptic number.

It is an amenable number.

2179486856 is a deficient number, since it is larger than the sum of its proper divisors (2010779224).

2179486856 is a wasteful number, since it uses less digits than its factorization.

2179486856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6485 (or 6481 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 56.

The square root of 2179486856 is about 46684.9746278179. The cubic root of 2179486856 is about 1296.5365116600.

The spelling of 2179486856 in words is "two billion, one hundred seventy-nine million, four hundred eighty-six thousand, eight hundred fifty-six".