84789939812 has 24 divisors (see below), whose sum is σ = 153595242360. Its totient is φ = 40907417600.

The previous prime is 84789939811. The next prime is 84789939821. The reversal of 84789939812 is 21893998748.

It can be written as a sum of positive squares in 4 ways, for example, as 13748500516 + 71041439296 = 117254^2 + 266536^2 .

It is not an unprimeable number, because it can be changed into a prime (84789939811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42563 + ... + 413994.

It is an arithmetic number, because the mean of its divisors is an integer number (6399801765).

Almost surely, 2^84789939812 is an apocalyptic number.

It is an amenable number.

84789939812 is a deficient number, since it is larger than the sum of its proper divisors (68805302548).

84789939812 is a wasteful number, since it uses less digits than its factorization.

84789939812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458191 (or 458189 counting only the distinct ones).

The product of its digits is 62705664, while the sum is 68.

The spelling of 84789939812 in words is "eighty-four billion, seven hundred eighty-nine million, nine hundred thirty-nine thousand, eight hundred twelve".