8556571642 has 16 divisors (see below), whose sum is σ = 13619897280. Its totient is φ = 4022911552.

The previous prime is 8556571637. The next prime is 8556571651. The reversal of 8556571642 is 2461756558.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1573663 + ... + 1579090.

It is an arithmetic number, because the mean of its divisors is an integer number (851243580).

Almost surely, 2^8556571642 is an apocalyptic number.

8556571642 is a deficient number, since it is larger than the sum of its proper divisors (5063325638).

8556571642 is a wasteful number, since it uses less digits than its factorization.

8556571642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3152837.

The product of its digits is 2016000, while the sum is 49.

The square root of 8556571642 is about 92501.7385890665. The cubic root of 8556571642 is about 2045.3451108232.

The spelling of 8556571642 in words is "eight billion, five hundred fifty-six million, five hundred seventy-one thousand, six hundred forty-two".