81834393411 has 6 divisors (see below), whose sum is σ = 118205234940. Its totient is φ = 54556262268.

The previous prime is 81834393391. The next prime is 81834393437. The reversal of 81834393411 is 11439343818.

81834393411 is a `hidden beast` number, since 8 + 183 + 439 + 34 + 1 + 1 = 666.

It is not a de Polignac number, because 81834393411 - 2⁵ = 81834393379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81834393451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4546355181 + ... + 4546355198.

It is an arithmetic number, because the mean of its divisors is an integer number (19700872490).

Almost surely, 2^81834393411 is an apocalyptic number.

81834393411 is a deficient number, since it is larger than the sum of its proper divisors (36370841529).

81834393411 is a wasteful number, since it uses less digits than its factorization.

81834393411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9092710385 (or 9092710382 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The spelling of 81834393411 in words is "eighty-one billion, eight hundred thirty-four million, three hundred ninety-three thousand, four hundred eleven".