84579411820 has 12 divisors (see below), whose sum is σ = 177616764864. Its totient is φ = 33831764720.

The previous prime is 84579411817. The next prime is 84579411871. The reversal of 84579411820 is 2811497548.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2114485276 + ... + 2114485315.

It is an arithmetic number, because the mean of its divisors is an integer number (14801397072).

Almost surely, 2^84579411820 is an apocalyptic number.

It is an amenable number.

84579411820 is an abundant number, since it is smaller than the sum of its proper divisors (93037353044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

84579411820 is a wasteful number, since it uses less digits than its factorization.

84579411820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4228970600 (or 4228970598 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 49.

The spelling of 84579411820 in words is "eighty-four billion, five hundred seventy-nine million, four hundred eleven thousand, eight hundred twenty".