842536635193 has 4 divisors (see below), whose sum is σ = 919130874768. Its totient is φ = 765942395620.

The previous prime is 842536635179. The next prime is 842536635203. The reversal of 842536635193 is 391536635248.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-842536635193 is a prime.

It is a super-2 number, since 2×842536635193² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (842536635173) 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, 38297119771 + ... + 38297119792.

It is an arithmetic number, because the mean of its divisors is an integer number (229782718692).

Almost surely, 2^842536635193 is an apocalyptic number.

It is an amenable number.

842536635193 is a deficient number, since it is larger than the sum of its proper divisors (76594239575).

842536635193 is a wasteful number, since it uses less digits than its factorization.

842536635193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76594239574.

The product of its digits is 13996800, while the sum is 55.

Adding to 842536635193 its sum of digits (55), we get a palindrome (842536635248).

The spelling of 842536635193 in words is "eight hundred forty-two billion, five hundred thirty-six million, six hundred thirty-five thousand, one hundred ninety-three".