82081395829 has 4 divisors (see below), whose sum is σ = 82927595884. Its totient is φ = 81235195776.

The previous prime is 82081395827. The next prime is 82081395863. The reversal of 82081395829 is 92859318028.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12904505604 + 69176890225 = 113598^2 + 263015^2 .

It is a cyclic number.

It is not a de Polignac number, because 82081395829 - 2¹ = 82081395827 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82081395829.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82081395827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423099882 + ... + 423100075.

It is an arithmetic number, because the mean of its divisors is an integer number (20731898971).

Almost surely, 2^82081395829 is an apocalyptic number.

It is an amenable number.

82081395829 is a deficient number, since it is larger than the sum of its proper divisors (846200055).

82081395829 is an equidigital number, since it uses as much as digits as its factorization.

82081395829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846200054.

The product of its (nonzero) digits is 2488320, while the sum is 55.

The spelling of 82081395829 in words is "eighty-two billion, eighty-one million, three hundred ninety-five thousand, eight hundred twenty-nine".