81102881676 has 48 divisors (see below), whose sum is σ = 189724203648. Its totient is φ = 26965209600.

The previous prime is 81102881653. The next prime is 81102881687. The reversal of 81102881676 is 67618820118.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10339516 + ... + 10347356.

It is an arithmetic number, because the mean of its divisors is an integer number (3952587576).

Almost surely, 2^81102881676 is an apocalyptic number.

It is an amenable number.

81102881676 is an abundant number, since it is smaller than the sum of its proper divisors (108621321972).

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

81102881676 is a wasteful number, since it uses less digits than its factorization.

81102881676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9942 (or 9940 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 48.

The spelling of 81102881676 in words is "eighty-one billion, one hundred two million, eight hundred eighty-one thousand, six hundred seventy-six".