878864693776 has 20 divisors (see below), whose sum is σ = 1702862256492. Its totient is φ = 439416369536.

The previous prime is 878864693677. The next prime is 878864693797. The reversal of 878864693776 is 677396468878.

It can be written as a sum of positive squares in 2 ways, for example, as 747982819600 + 130881874176 = 864860^2 + 361776^2 .

It is a junction number, because it is equal to n+sod(n) for n = 878864693696 and 878864693705.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 538351 + ... + 1430926.

Almost surely, 2^878864693776 is an apocalyptic number.

It is an amenable number.

878864693776 is a deficient number, since it is larger than the sum of its proper divisors (823997562716).

878864693776 is a wasteful number, since it uses less digits than its factorization.

878864693776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1997178 (or 1997172 counting only the distinct ones).

The product of its digits is 4096770048, while the sum is 79.

The spelling of 878864693776 in words is "eight hundred seventy-eight billion, eight hundred sixty-four million, six hundred ninety-three thousand, seven hundred seventy-six".