878649946878 has 16 divisors (see below), whose sum is σ = 1917054429696. Its totient is φ = 266257559640.

The previous prime is 878649946717. The next prime is 878649946891.

878649946878 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 878649946878.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6656438926 + ... + 6656439057.

It is an arithmetic number, because the mean of its divisors is an integer number (119815901856).

Almost surely, 2^878649946878 is an apocalyptic number.

878649946878 is an abundant number, since it is smaller than the sum of its proper divisors (1038404482818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

878649946878 is a wasteful number, since it uses less digits than its factorization.

878649946878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13312877999.

The product of its digits is 9364045824, while the sum is 84.

The spelling of 878649946878 in words is "eight hundred seventy-eight billion, six hundred forty-nine million, nine hundred forty-six thousand, eight hundred seventy-eight".