82804331980921 has 32 divisors (see below), whose sum is σ = 86221481472000. Its totient is φ = 79483256052480.

The previous prime is 82804331980907. The next prime is 82804331980933. The reversal of 82804331980921 is 12908913340828.

It is a cyclic number.

It is not a de Polignac number, because 82804331980921 - 2¹⁵ = 82804331948153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82804331080921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 146966055 + ... + 147528403.

It is an arithmetic number, because the mean of its divisors is an integer number (2694421296000).

Almost surely, 2^{82804331980921} is an apocalyptic number.

It is an amenable number.

82804331980921 is a deficient number, since it is larger than the sum of its proper divisors (3417149491079).

82804331980921 is a wasteful number, since it uses less digits than its factorization.

82804331980921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562849.

The product of its (nonzero) digits is 5971968, while the sum is 58.

The spelling of 82804331980921 in words is "eighty-two trillion, eight hundred four billion, three hundred thirty-one million, nine hundred eighty thousand, nine hundred twenty-one".