82439854491 has 4 divisors (see below), whose sum is σ = 109919805992. Its totient is φ = 54959902992.

The previous prime is 82439854489. The next prime is 82439854499. The reversal of 82439854491 is 19445893428.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 82439854491 - 2¹ = 82439854489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82439854499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13739975746 + ... + 13739975751.

It is an arithmetic number, because the mean of its divisors is an integer number (27479951498).

Almost surely, 2^82439854491 is an apocalyptic number.

82439854491 is a deficient number, since it is larger than the sum of its proper divisors (27479951501).

82439854491 is a wasteful number, since it uses less digits than its factorization.

82439854491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27479951500.

The product of its digits is 9953280, while the sum is 57.

The spelling of 82439854491 in words is "eighty-two billion, four hundred thirty-nine million, eight hundred fifty-four thousand, four hundred ninety-one".