81734000804 has 24 divisors (see below), whose sum is σ = 150571901760. Its totient is φ = 38713722336.

The previous prime is 81734000779. The next prime is 81734000839. The reversal of 81734000804 is 40800043718.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2154569 + ... + 2192175.

It is an arithmetic number, because the mean of its divisors is an integer number (6273829240).

Almost surely, 2^81734000804 is an apocalyptic number.

It is an amenable number.

81734000804 is a deficient number, since it is larger than the sum of its proper divisors (68837900956).

81734000804 is a wasteful number, since it uses less digits than its factorization.

81734000804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66227 (or 66225 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The spelling of 81734000804 in words is "eighty-one billion, seven hundred thirty-four million, eight hundred four", and thus it is an aban number.