82320795181821 has 16 divisors (see below), whose sum is σ = 125441362240128. Its totient is φ = 47040397939200.

The previous prime is 82320795181787. The next prime is 82320795181841. The reversal of 82320795181821 is 12818159702328.

It is not a de Polignac number, because 82320795181821 - 2⁷ = 82320795181693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82320795181841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20917801 + ... + 24539681.

It is an arithmetic number, because the mean of its divisors is an integer number (7840085140008).

Almost surely, 2^{82320795181821} is an apocalyptic number.

It is an amenable number.

82320795181821 is a deficient number, since it is larger than the sum of its proper divisors (43120567058307).

82320795181821 is a wasteful number, since it uses less digits than its factorization.

82320795181821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4704212.

The product of its (nonzero) digits is 3870720, while the sum is 57.

The spelling of 82320795181821 in words is "eighty-two trillion, three hundred twenty billion, seven hundred ninety-five million, one hundred eighty-one thousand, eight hundred twenty-one".