18256386228255 has 48 divisors (see below), whose sum is σ = 37412101846080. Its totient is φ = 8057991158784.

The previous prime is 18256386228251. The next prime is 18256386228293. The reversal of 18256386228255 is 55282268365281.

It is a happy number.

18256386228255 is a `hidden beast` number, since 1 + 8 + 2 + 5 + 6 + 386 + 228 + 25 + 5 = 666.

It is not a de Polignac number, because 18256386228255 - 2² = 18256386228251 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 18256386228192 and 18256386228201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18256386228251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 999245722 + ... + 999263991.

It is an arithmetic number, because the mean of its divisors is an integer number (779418788460).

Almost surely, 2^{18256386228255} is an apocalyptic number.

18256386228255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18256386228255 is an abundant number, since it is smaller than the sum of its proper divisors (19155715617825).

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

18256386228255 is a wasteful number, since it uses less digits than its factorization.

18256386228255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998509760 (or 1998509757 counting only the distinct ones).

The product of its digits is 110592000, while the sum is 63.

The spelling of 18256386228255 in words is "eighteen trillion, two hundred fifty-six billion, three hundred eighty-six million, two hundred twenty-eight thousand, two hundred fifty-five".