878729330617 has 2 divisors, whose sum is σ = 878729330618. Its totient is φ = 878729330616.

The previous prime is 878729330597. The next prime is 878729330669. The reversal of 878729330617 is 716033927878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 538967412736 + 339761917881 = 734144^2 + 582891^2 .

It is a cyclic number.

It is not a de Polignac number, because 878729330617 - 2³⁵ = 844369592249 is a prime.

It is not a weakly prime, because it can be changed into another prime (878729030617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439364665308 + 439364665309.

It is an arithmetic number, because the mean of its divisors is an integer number (439364665309).

Almost surely, 2^878729330617 is an apocalyptic number.

It is an amenable number.

878729330617 is a deficient number, since it is larger than the sum of its proper divisors (1).

878729330617 is an equidigital number, since it uses as much as digits as its factorization.

878729330617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21337344, while the sum is 61.

The spelling of 878729330617 in words is "eight hundred seventy-eight billion, seven hundred twenty-nine million, three hundred thirty thousand, six hundred seventeen".