81488688068 has 12 divisors (see below), whose sum is σ = 143937963792. Its totient is φ = 40363555560.

The previous prime is 81488688059. The next prime is 81488688091. The reversal of 81488688068 is 86088688418.

It is a junction number, because it is equal to n+sod(n) for n = 81488687995 and 81488688013.

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 3 ways as a sum of consecutive naturals, for example, 95196638 + ... + 95197493.

It is an arithmetic number, because the mean of its divisors is an integer number (11994830316).

Almost surely, 2^81488688068 is an apocalyptic number.

It is an amenable number.

81488688068 is a deficient number, since it is larger than the sum of its proper divisors (62449275724).

81488688068 is a wasteful number, since it uses less digits than its factorization.

81488688068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190394242 (or 190394240 counting only the distinct ones).

The product of its (nonzero) digits is 37748736, while the sum is 65.

The spelling of 81488688068 in words is "eighty-one billion, four hundred eighty-eight million, six hundred eighty-eight thousand, sixty-eight".