81232012766 has 8 divisors (see below), whose sum is σ = 127145759184. Its totient is φ = 38850093040.

The previous prime is 81232012643. The next prime is 81232012777. The reversal of 81232012766 is 66721023218.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 882956615 + ... + 882956706.

It is an arithmetic number, because the mean of its divisors is an integer number (15893219898).

Almost surely, 2^81232012766 is an apocalyptic number.

81232012766 is a deficient number, since it is larger than the sum of its proper divisors (45913746418).

81232012766 is a wasteful number, since it uses less digits than its factorization.

81232012766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1765913346.

The product of its (nonzero) digits is 48384, while the sum is 38.

The spelling of 81232012766 in words is "eighty-one billion, two hundred thirty-two million, twelve thousand, seven hundred sixty-six".