878555659913 has 2 divisors, whose sum is σ = 878555659914. Its totient is φ = 878555659912.

The previous prime is 878555659879. The next prime is 878555659957. The reversal of 878555659913 is 319956555878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 730320649744 + 148235010169 = 854588^2 + 385013^2 .

It is a cyclic number.

It is not a de Polignac number, because 878555659913 - 2²⁸ = 878287224457 is a prime.

It is not a weakly prime, because it can be changed into another prime (878555659973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439277829956 + 439277829957.

It is an arithmetic number, because the mean of its divisors is an integer number (439277829957).

Almost surely, 2^878555659913 is an apocalyptic number.

It is an amenable number.

878555659913 is a deficient number, since it is larger than the sum of its proper divisors (1).

878555659913 is an equidigital number, since it uses as much as digits as its factorization.

878555659913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240000, while the sum is 71.

The spelling of 878555659913 in words is "eight hundred seventy-eight billion, five hundred fifty-five million, six hundred fifty-nine thousand, nine hundred thirteen".