878185284847 has 4 divisors (see below), whose sum is σ = 945737999080. Its totient is φ = 810632570616.

The previous prime is 878185284797. The next prime is 878185284871. The reversal of 878185284847 is 748482581878.

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

It is a cyclic number.

It is not a de Polignac number, because 878185284847 - 2¹⁹ = 878184760559 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 (878185288847) 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, 33776357097 + ... + 33776357122.

It is an arithmetic number, because the mean of its divisors is an integer number (236434499770).

Almost surely, 2^878185284847 is an apocalyptic number.

878185284847 is a deficient number, since it is larger than the sum of its proper divisors (67552714233).

878185284847 is a wasteful number, since it uses less digits than its factorization.

878185284847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67552714232.

The product of its digits is 256901120, while the sum is 70.

The spelling of 878185284847 in words is "eight hundred seventy-eight billion, one hundred eighty-five million, two hundred eighty-four thousand, eight hundred forty-seven".