81467861173 has 8 divisors (see below), whose sum is σ = 85770705920. Its totient is φ = 77166522720.

The previous prime is 81467861143. The next prime is 81467861179. The reversal of 81467861173 is 37116876418.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81467861173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81467861173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81467861179) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 264693 + ... + 482698.

It is an arithmetic number, because the mean of its divisors is an integer number (10721338240).

Almost surely, 2^81467861173 is an apocalyptic number.

It is an amenable number.

81467861173 is a deficient number, since it is larger than the sum of its proper divisors (4302844747).

81467861173 is a wasteful number, since it uses less digits than its factorization.

81467861173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753147.

The product of its digits is 1354752, while the sum is 52.

The spelling of 81467861173 in words is "eighty-one billion, four hundred sixty-seven million, eight hundred sixty-one thousand, one hundred seventy-three".