84521618416 has 80 divisors (see below), whose sum is σ = 168989184000. Its totient is φ = 40938902784.

The previous prime is 84521618413. The next prime is 84521618459. The reversal of 84521618416 is 61481612548.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84521618413) 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, 15629185 + ... + 15634591.

It is an arithmetic number, because the mean of its divisors is an integer number (2112364800).

Almost surely, 2^84521618416 is an apocalyptic number.

It is an amenable number.

84521618416 is a deficient number, since it is larger than the sum of its proper divisors (84467565584).

84521618416 is a wasteful number, since it uses less digits than its factorization.

84521618416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5726 (or 5720 counting only the distinct ones).

The product of its digits is 368640, while the sum is 46.

The spelling of 84521618416 in words is "eighty-four billion, five hundred twenty-one million, six hundred eighteen thousand, four hundred sixteen".