878744738561768 has 64 divisors (see below), whose sum is σ = 1813207969440000. Its totient is φ = 396711611764992.

The previous prime is 878744738561759. The next prime is 878744738561773. The reversal of 878744738561768 is 867165837447878.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44601683 + ... + 61211106.

It is an arithmetic number, because the mean of its divisors is an integer number (28331374522500).

Almost surely, 2^{878744738561768} is an apocalyptic number.

It is an amenable number.

878744738561768 is an abundant number, since it is smaller than the sum of its proper divisors (934463230878232).

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

878744738561768 is a wasteful number, since it uses less digits than its factorization.

878744738561768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105814554 (or 105814550 counting only the distinct ones).

The product of its digits is 84970045440, while the sum is 89.

The spelling of 878744738561768 in words is "eight hundred seventy-eight trillion, seven hundred forty-four billion, seven hundred thirty-eight million, five hundred sixty-one thousand, seven hundred sixty-eight".