84242831506517 has 4 divisors (see below), whose sum is σ = 85623861531276. Its totient is φ = 82861801481760.

The previous prime is 84242831506511. The next prime is 84242831506531. The reversal of 84242831506517 is 71560513824248.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45593744354596 + 38649087151921 = 6752314^2 + 6216839^2 .

It is a cyclic number.

It is not a de Polignac number, because 84242831506517 - 2¹⁰ = 84242831505493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84242831506511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 690515012288 + ... + 690515012409.

It is an arithmetic number, because the mean of its divisors is an integer number (21405965382819).

Almost surely, 2^{84242831506517} is an apocalyptic number.

It is an amenable number.

84242831506517 is a deficient number, since it is larger than the sum of its proper divisors (1381030024759).

84242831506517 is a wasteful number, since it uses less digits than its factorization.

84242831506517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1381030024758.

The product of its (nonzero) digits is 12902400, while the sum is 56.

The spelling of 84242831506517 in words is "eighty-four trillion, two hundred forty-two billion, eight hundred thirty-one million, five hundred six thousand, five hundred seventeen".