842501016689 has 4 divisors (see below), whose sum is σ = 846180060660. Its totient is φ = 838821972720.

The previous prime is 842501016683. The next prime is 842501016719. The reversal of 842501016689 is 986610105248.

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 802830336064 + 39670680625 = 896008^2 + 199175^2 .

It is a cyclic number.

It is not a de Polignac number, because 842501016689 - 2¹⁶ = 842500951153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (842501016683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1839521642 + ... + 1839522099.

It is an arithmetic number, because the mean of its divisors is an integer number (211545015165).

Almost surely, 2^842501016689 is an apocalyptic number.

It is an amenable number.

842501016689 is a deficient number, since it is larger than the sum of its proper divisors (3679043971).

842501016689 is a wasteful number, since it uses less digits than its factorization.

842501016689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3679043970.

The product of its (nonzero) digits is 829440, while the sum is 50.

The spelling of 842501016689 in words is "eight hundred forty-two billion, five hundred one million, sixteen thousand, six hundred eighty-nine".