81168442232 has 16 divisors (see below), whose sum is σ = 152213082000. Its totient is φ = 40578287040.

The previous prime is 81168442211. The next prime is 81168442259. The reversal of 81168442232 is 23224486118.

It is a happy number.

It is a super-3 number, since 3×81168442232³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 81168442232.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 683357 + ... + 793292.

It is an arithmetic number, because the mean of its divisors is an integer number (9513317625).

Almost surely, 2^81168442232 is an apocalyptic number.

It is an amenable number.

81168442232 is a deficient number, since it is larger than the sum of its proper divisors (71044639768).

81168442232 is a wasteful number, since it uses less digits than its factorization.

81168442232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1483526 (or 1483522 counting only the distinct ones).

The product of its digits is 147456, while the sum is 41.

The spelling of 81168442232 in words is "eighty-one billion, one hundred sixty-eight million, four hundred forty-two thousand, two hundred thirty-two".