82861394424 has 128 divisors (see below), whose sum is σ = 224228736000. Its totient is φ = 25417318400.

The previous prime is 82861394423. The next prime is 82861394443. The reversal of 82861394424 is 42449316828.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82861394423) 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 31 ways as a sum of consecutive naturals, for example, 30699427 + ... + 30702125.

It is an arithmetic number, because the mean of its divisors is an integer number (1751787000).

Almost surely, 2^82861394424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82861394424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112114368000).

82861394424 is an abundant number, since it is smaller than the sum of its proper divisors (141367341576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82861394424 is a wasteful number, since it uses less digits than its factorization.

82861394424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4373 (or 4369 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 51.

The spelling of 82861394424 in words is "eighty-two billion, eight hundred sixty-one million, three hundred ninety-four thousand, four hundred twenty-four".