81068100368 has 40 divisors (see below), whose sum is σ = 163921133376. Its totient is φ = 38766358400.

The previous prime is 81068100331. The next prime is 81068100389. The reversal of 81068100368 is 86300186018.

It is a super-2 number, since 2×81068100368² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4410878 + ... + 4429218.

Almost surely, 2^81068100368 is an apocalyptic number.

It is an amenable number.

81068100368 is an abundant number, since it is smaller than the sum of its proper divisors (82853033008).

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

81068100368 is a wasteful number, since it uses less digits than its factorization.

81068100368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30383 (or 30377 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 41.

The spelling of 81068100368 in words is "eighty-one billion, sixty-eight million, one hundred thousand, three hundred sixty-eight".