868849519177 has 2 divisors, whose sum is σ = 868849519178. Its totient is φ = 868849519176.

The previous prime is 868849519123. The next prime is 868849519217. The reversal of 868849519177 is 771915948868.

868849519177 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 751591899136 + 117257620041 = 866944^2 + 342429^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-868849519177 is a prime.

It is not a weakly prime, because it can be changed into another prime (868849519117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434424759588 + 434424759589.

It is an arithmetic number, because the mean of its divisors is an integer number (434424759589).

Almost surely, 2^868849519177 is an apocalyptic number.

It is an amenable number.

868849519177 is a deficient number, since it is larger than the sum of its proper divisors (1).

868849519177 is an equidigital number, since it uses as much as digits as its factorization.

868849519177 is an evil number, because the sum of its binary digits is even.

The product of its digits is 243855360, while the sum is 73.

The spelling of 868849519177 in words is "eight hundred sixty-eight billion, eight hundred forty-nine million, five hundred nineteen thousand, one hundred seventy-seven".