858457198117 has 2 divisors, whose sum is σ = 858457198118. Its totient is φ = 858457198116.

The previous prime is 858457198073. The next prime is 858457198169. The reversal of 858457198117 is 711891754858.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 651949664356 + 206507533761 = 807434^2 + 454431^2 .

It is a cyclic number.

It is not a de Polignac number, because 858457198117 - 2³⁵ = 824097459749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (858457198517) by changing a digit.

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 as a sum of consecutive naturals, namely, 429228599058 + 429228599059.

It is an arithmetic number, because the mean of its divisors is an integer number (429228599059).

Almost surely, 2^858457198117 is an apocalyptic number.

It is an amenable number.

858457198117 is a deficient number, since it is larger than the sum of its proper divisors (1).

858457198117 is an equidigital number, since it uses as much as digits as its factorization.

858457198117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22579200, while the sum is 64.

The spelling of 858457198117 in words is "eight hundred fifty-eight billion, four hundred fifty-seven million, one hundred ninety-eight thousand, one hundred seventeen".