18256386228256 has 48 divisors (see below), whose sum is σ = 39260727142560. Its totient is φ = 8287566151680.

The previous prime is 18256386228251. The next prime is 18256386228293. The reversal of 18256386228256 is 65282268365281.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18256386228251) 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, 33451506 + ... + 33992881.

It is an arithmetic number, because the mean of its divisors is an integer number (817931815470).

Almost surely, 2^{18256386228256} is an apocalyptic number.

18256386228256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18256386228256 is an abundant number, since it is smaller than the sum of its proper divisors (21004340914304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18256386228256 is a wasteful number, since it uses less digits than its factorization.

18256386228256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67445177 (or 67445169 counting only the distinct ones).

The product of its digits is 132710400, while the sum is 64.

The spelling of 18256386228256 in words is "eighteen trillion, two hundred fifty-six billion, three hundred eighty-six million, two hundred twenty-eight thousand, two hundred fifty-six".