84515385321 has 12 divisors (see below), whose sum is σ = 122147440948. Its totient is φ = 56311438464.

The previous prime is 84515385209. The next prime is 84515385323. The reversal of 84515385321 is 12358351548.

84515385321 is a `hidden beast` number, since 8 + 45 + 1 + 538 + 53 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6444878400 + 78070506921 = 80280^2 + 279411^2 .

It is not a de Polignac number, because 84515385321 - 2⁷ = 84515385193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84515385323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2662660 + ... + 2694213.

Almost surely, 2^84515385321 is an apocalyptic number.

It is an amenable number.

84515385321 is a deficient number, since it is larger than the sum of its proper divisors (37632055627).

84515385321 is a wasteful number, since it uses less digits than its factorization.

84515385321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5358632 (or 5358629 counting only the distinct ones).

The product of its digits is 576000, while the sum is 45.

The spelling of 84515385321 in words is "eighty-four billion, five hundred fifteen million, three hundred eighty-five thousand, three hundred twenty-one".