81080835560 has 32 divisors (see below), whose sum is σ = 190363703040. Its totient is φ = 31022232384.

The previous prime is 81080835541. The next prime is 81080835599. The reversal of 81080835560 is 6553808018.

It is an unprimeable number.

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, 44064752 + ... + 44066591.

It is an arithmetic number, because the mean of its divisors is an integer number (5948865720).

Almost surely, 2^81080835560 is an apocalyptic number.

It is an amenable number.

81080835560 is an abundant number, since it is smaller than the sum of its proper divisors (109282867480).

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

81080835560 is a wasteful number, since it uses less digits than its factorization.

81080835560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88131377 (or 88131373 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 44.

The spelling of 81080835560 in words is "eighty-one billion, eighty million, eight hundred thirty-five thousand, five hundred sixty".