878808807767045 has 4 divisors (see below), whose sum is σ = 1054570569320460. Its totient is φ = 703047046213632.

The previous prime is 878808807767039. The next prime is 878808807767047. The reversal of 878808807767045 is 540767708808878.

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

It can be written as a sum of positive squares in 2 ways, for example, as 303585809553796 + 575222998213249 = 17423714^2 + 23983807^2 .

It is a cyclic number.

It is not a de Polignac number, because 878808807767045 - 2⁴ = 878808807767029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878808807767047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87880880776700 + ... + 87880880776709.

It is an arithmetic number, because the mean of its divisors is an integer number (263642642330115).

Almost surely, 2^{878808807767045} is an apocalyptic number.

It is an amenable number.

878808807767045 is a deficient number, since it is larger than the sum of its proper divisors (175761761553415).

878808807767045 is a wasteful number, since it uses less digits than its factorization.

878808807767045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175761761553414.

The product of its (nonzero) digits is 9441116160, while the sum is 83.

The spelling of 878808807767045 in words is "eight hundred seventy-eight trillion, eight hundred eight billion, eight hundred seven million, seven hundred sixty-seven thousand, forty-five".