81800067701 has 8 divisors (see below), whose sum is σ = 89238534624. Its totient is φ = 74361950320.

The previous prime is 81800067689. The next prime is 81800067719. The reversal of 81800067701 is 10776000818.

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 81800067701 - 2²⁶ = 81732958837 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 (81800067721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 755306 + ... + 856788.

It is an arithmetic number, because the mean of its divisors is an integer number (11154816828).

Almost surely, 2^81800067701 is an apocalyptic number.

It is an amenable number.

81800067701 is a deficient number, since it is larger than the sum of its proper divisors (7438466923).

81800067701 is a wasteful number, since it uses less digits than its factorization.

81800067701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174771.

The product of its (nonzero) digits is 18816, while the sum is 38.

The spelling of 81800067701 in words is "eighty-one billion, eight hundred million, sixty-seven thousand, seven hundred one".