81267542548182 has 48 divisors (see below), whose sum is σ = 187054831493712. Its totient is φ = 26428469114880.

The previous prime is 81267542548111. The next prime is 81267542548211. The reversal of 81267542548182 is 28184524576218.

81267542548182 is a `hidden beast` number, since 8 + 1 + 2 + 6 + 7 + 5 + 4 + 2 + 548 + 1 + 82 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2039213803 + ... + 2039253654.

It is an arithmetic number, because the mean of its divisors is an integer number (3896975656119).

Almost surely, 2^{81267542548182} is an apocalyptic number.

81267542548182 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

81267542548182 is an abundant number, since it is smaller than the sum of its proper divisors (105787288945530).

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

81267542548182 is a wasteful number, since it uses less digits than its factorization.

81267542548182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4078467515 (or 4078467503 counting only the distinct ones).

The product of its digits is 68812800, while the sum is 63.

The spelling of 81267542548182 in words is "eighty-one trillion, two hundred sixty-seven billion, five hundred forty-two million, five hundred forty-eight thousand, one hundred eighty-two".