81804716807 has 8 divisors (see below), whose sum is σ = 90463996560. Its totient is φ = 73349184960.

The previous prime is 81804716759. The next prime is 81804716831. The reversal of 81804716807 is 70861740818.

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

It is a cyclic number.

It is not a de Polignac number, because 81804716807 - 2⁶ = 81804716743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81804716857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50936132 + ... + 50937737.

It is an arithmetic number, because the mean of its divisors is an integer number (11307999570).

Almost surely, 2^81804716807 is an apocalyptic number.

81804716807 is a deficient number, since it is larger than the sum of its proper divisors (8659279753).

81804716807 is a wasteful number, since it uses less digits than its factorization.

81804716807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101873953.

The product of its (nonzero) digits is 602112, while the sum is 50.

The spelling of 81804716807 in words is "eighty-one billion, eight hundred four million, seven hundred sixteen thousand, eight hundred seven".