842508417505 has 4 divisors (see below), whose sum is σ = 1011010101012. Its totient is φ = 674006734000.

The previous prime is 842508417463. The next prime is 842508417523. The reversal of 842508417505 is 505714805248.

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 641812481424 + 200695936081 = 801132^2 + 447991^2 .

It is not a de Polignac number, because 842508417505 - 2¹¹ = 842508415457 is a prime.

It is a Smith number, since the sum of its digits (49) 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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84250841746 + ... + 84250841755.

It is an arithmetic number, because the mean of its divisors is an integer number (252752525253).

Almost surely, 2^842508417505 is an apocalyptic number.

It is an amenable number.

842508417505 is a deficient number, since it is larger than the sum of its proper divisors (168501683507).

842508417505 is a wasteful number, since it uses less digits than its factorization.

842508417505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168501683506.

The product of its (nonzero) digits is 1792000, while the sum is 49.

The spelling of 842508417505 in words is "eight hundred forty-two billion, five hundred eight million, four hundred seventeen thousand, five hundred five".