81200854276 has 24 divisors (see below), whose sum is σ = 146943336960. Its totient is φ = 39221649600.

The previous prime is 81200854223. The next prime is 81200854277. The reversal of 81200854276 is 67245800218.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (81200854277) 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 7 ways as a sum of consecutive naturals, for example, 504880 + ... + 645991.

It is an arithmetic number, because the mean of its divisors is an integer number (6122639040).

Almost surely, 2^81200854276 is an apocalyptic number.

It is an amenable number.

81200854276 is a deficient number, since it is larger than the sum of its proper divisors (65742482684).

81200854276 is a wasteful number, since it uses less digits than its factorization.

81200854276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151475 (or 1151473 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 43.

The spelling of 81200854276 in words is "eighty-one billion, two hundred million, eight hundred fifty-four thousand, two hundred seventy-six".