81384732606 has 8 divisors (see below), whose sum is σ = 162769465224. Its totient is φ = 27128244200.

The previous prime is 81384732593. The next prime is 81384732613. The reversal of 81384732606 is 60623748318.

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

81384732606 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6782061045 + ... + 6782061056.

It is an arithmetic number, because the mean of its divisors is an integer number (20346183153).

Almost surely, 2^81384732606 is an apocalyptic number.

81384732606 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81384732606 is a wasteful number, since it uses less digits than its factorization.

81384732606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13564122106.

The product of its (nonzero) digits is 1161216, while the sum is 48.

The spelling of 81384732606 in words is "eighty-one billion, three hundred eighty-four million, seven hundred thirty-two thousand, six hundred six".