878901109878 has 16 divisors (see below), whose sum is σ = 1917602421696. Its totient is φ = 266333669640.

The previous prime is 878901109847. The next prime is 878901109901.

878901109878 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (66), and also a Moran number because the ratio is a prime number: 13316683483 = 878901109878 / (8 + 7 + 8 + 9 + 0 + 1 + 1 + 0 + 9 + 8 + 7 + 8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6658341676 + ... + 6658341807.

It is an arithmetic number, because the mean of its divisors is an integer number (119850151356).

Almost surely, 2^878901109878 is an apocalyptic number.

878901109878 is an abundant number, since it is smaller than the sum of its proper divisors (1038701311818).

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

878901109878 is a wasteful number, since it uses less digits than its factorization.

878901109878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13316683499.

The product of its (nonzero) digits is 16257024, while the sum is 66.

The spelling of 878901109878 in words is "eight hundred seventy-eight billion, nine hundred one million, one hundred nine thousand, eight hundred seventy-eight".