84784478544 has 160 divisors (see below), whose sum is σ = 257463680000. Its totient is φ = 26638989696.

The previous prime is 84784478521. The next prime is 84784478557. The reversal of 84784478544 is 44587448748.

84784478544 is a `hidden beast` number, since 8 + 4 + 7 + 84 + 4 + 7 + 8 + 544 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1607439 + ... + 1659345.

It is an arithmetic number, because the mean of its divisors is an integer number (1609148000).

Almost surely, 2^84784478544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84784478544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128731840000).

84784478544 is an abundant number, since it is smaller than the sum of its proper divisors (172679201456).

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

84784478544 is a wasteful number, since it uses less digits than its factorization.

84784478544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52142 (or 52130 counting only the distinct ones).

The product of its digits is 128450560, while the sum is 63.

The spelling of 84784478544 in words is "eighty-four billion, seven hundred eighty-four million, four hundred seventy-eight thousand, five hundred forty-four".