84784384505 has 8 divisors (see below), whose sum is σ = 101757264072. Its totient is φ = 67816839168.

The previous prime is 84784384493. The next prime is 84784384507. The reversal of 84784384505 is 50548348748.

It can be written as a sum of positive squares in 4 ways, for example, as 50185408441 + 34598976064 = 224021^2 + 186008^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 84784384505 - 2²⁶ = 84717275641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84784384507) 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, 1298504 + ... + 1362233.

It is an arithmetic number, because the mean of its divisors is an integer number (12719658009).

Almost surely, 2^84784384505 is an apocalyptic number.

It is an amenable number.

84784384505 is a deficient number, since it is larger than the sum of its proper divisors (16972879567).

84784384505 is a wasteful number, since it uses less digits than its factorization.

84784384505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2667115.

The product of its (nonzero) digits is 17203200, while the sum is 56.

The spelling of 84784384505 in words is "eighty-four billion, seven hundred eighty-four million, three hundred eighty-four thousand, five hundred five".