81844270939199 has 8 divisors (see below), whose sum is σ = 83509661172048. Its totient is φ = 80189322024960.

The previous prime is 81844270939169. The next prime is 81844270939219. The reversal of 81844270939199 is 99193907244818.

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 81844270939199 - 2¹² = 81844270935103 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 (81844270939169) 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, 2610313817 + ... + 2610345170.

It is an arithmetic number, because the mean of its divisors is an integer number (10438707646506).

Almost surely, 2^{81844270939199} is an apocalyptic number.

81844270939199 is a deficient number, since it is larger than the sum of its proper divisors (1665390232849).

81844270939199 is a wasteful number, since it uses less digits than its factorization.

81844270939199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5220659305.

The product of its (nonzero) digits is 282175488, while the sum is 74.

The spelling of 81844270939199 in words is "eighty-one trillion, eight hundred forty-four billion, two hundred seventy million, nine hundred thirty-nine thousand, one hundred ninety-nine".