842509250005 has 4 divisors (see below), whose sum is σ = 1011011100012. Its totient is φ = 674007400000.

The previous prime is 842509249997. The next prime is 842509250017. The reversal of 842509250005 is 500052905248.

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 355404360964 + 487104889041 = 596158^2 + 697929^2 .

It is not a de Polignac number, because 842509250005 - 2³ = 842509249997 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 842509250005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84250924996 + ... + 84250925005.

It is an arithmetic number, because the mean of its divisors is an integer number (252752775003).

Almost surely, 2^842509250005 is an apocalyptic number.

It is an amenable number.

842509250005 is a deficient number, since it is larger than the sum of its proper divisors (168501850007).

842509250005 is a wasteful number, since it uses less digits than its factorization.

842509250005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168501850006.

The product of its (nonzero) digits is 144000, while the sum is 40.

The spelling of 842509250005 in words is "eight hundred forty-two billion, five hundred nine million, two hundred fifty thousand, five".