8256563272018 has 16 divisors (see below), whose sum is σ = 12579659748000. Its totient is φ = 4063570017696.

The previous prime is 8256563271997. The next prime is 8256563272019. The reversal of 8256563272018 is 8102723656528.

It is a self number, because there is not a number n which added to its sum of digits gives 8256563272018.

It is not an unprimeable number, because it can be changed into a prime (8256563272019) 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, 56592280 + ... + 56737987.

It is an arithmetic number, because the mean of its divisors is an integer number (786228734250).

Almost surely, 2^{8256563272018} is an apocalyptic number.

8256563272018 is a deficient number, since it is larger than the sum of its proper divisors (4323096475982).

8256563272018 is a wasteful number, since it uses less digits than its factorization.

8256563272018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113330841.

The product of its (nonzero) digits is 9676800, while the sum is 55.

The spelling of 8256563272018 in words is "eight trillion, two hundred fifty-six billion, five hundred sixty-three million, two hundred seventy-two thousand, eighteen".