82638198881 has 8 divisors (see below), whose sum is σ = 97490225664. Its totient is φ = 68547814560.

The previous prime is 82638198859. The next prime is 82638198893. The reversal of 82638198881 is 18889183628.

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 82638198881 - 2¹⁸ = 82637936737 is a prime.

It is a super-2 number, since 2×82638198881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82638198581) 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, 190410380 + ... + 190410813.

It is an arithmetic number, because the mean of its divisors is an integer number (12186278208).

Almost surely, 2^82638198881 is an apocalyptic number.

It is an amenable number.

82638198881 is a deficient number, since it is larger than the sum of its proper divisors (14852026783).

82638198881 is a wasteful number, since it uses less digits than its factorization.

82638198881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380821231.

The product of its digits is 10616832, while the sum is 62.

The spelling of 82638198881 in words is "eighty-two billion, six hundred thirty-eight million, one hundred ninety-eight thousand, eight hundred eighty-one".