81120327692 has 6 divisors (see below), whose sum is σ = 141960573468. Its totient is φ = 40560163844.

The previous prime is 81120327667. The next prime is 81120327697. The reversal of 81120327692 is 29672302118.

It is not an unprimeable number, because it can be changed into a prime (81120327697) by changing a digit.

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 as a sum of consecutive naturals, namely, 10140040958 + ... + 10140040965.

It is an arithmetic number, because the mean of its divisors is an integer number (23660095578).

Almost surely, 2^81120327692 is an apocalyptic number.

It is an amenable number.

81120327692 is a deficient number, since it is larger than the sum of its proper divisors (60840245776).

81120327692 is a wasteful number, since it uses less digits than its factorization.

81120327692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20280081927 (or 20280081925 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The spelling of 81120327692 in words is "eighty-one billion, one hundred twenty million, three hundred twenty-seven thousand, six hundred ninety-two".