81833715873 has 48 divisors (see below), whose sum is σ = 145511673216. Its totient is φ = 43156281600.

The previous prime is 81833715869. The next prime is 81833715883. The reversal of 81833715873 is 37851733818.

81833715873 is a `hidden beast` number, since 81 + 83 + 371 + 58 + 73 = 666.

It is not a de Polignac number, because 81833715873 - 2² = 81833715869 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81833715823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6928573 + ... + 6940373.

It is an arithmetic number, because the mean of its divisors is an integer number (3031493192).

Almost surely, 2^81833715873 is an apocalyptic number.

It is an amenable number.

81833715873 is a deficient number, since it is larger than the sum of its proper divisors (63677957343).

81833715873 is a wasteful number, since it uses less digits than its factorization.

81833715873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20294 (or 20291 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The spelling of 81833715873 in words is "eighty-one billion, eight hundred thirty-three million, seven hundred fifteen thousand, eight hundred seventy-three".