858706607849 has 2 divisors, whose sum is σ = 858706607850. Its totient is φ = 858706607848.

The previous prime is 858706607813. The next prime is 858706607893. The reversal of 858706607849 is 948706607858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 810552694249 + 48153913600 = 900307^2 + 219440^2 .

It is a cyclic number.

It is not a de Polignac number, because 858706607849 - 2¹⁶ = 858706542313 is a prime.

It is not a weakly prime, because it can be changed into another prime (858706607809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429353303924 + 429353303925.

It is an arithmetic number, because the mean of its divisors is an integer number (429353303925).

Almost surely, 2^858706607849 is an apocalyptic number.

It is an amenable number.

858706607849 is a deficient number, since it is larger than the sum of its proper divisors (1).

858706607849 is an equidigital number, since it uses as much as digits as its factorization.

858706607849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162570240, while the sum is 68.

Subtracting 858706607849 from its reverse (948706607858), we obtain a palindrome (90000000009).

The spelling of 858706607849 in words is "eight hundred fifty-eight billion, seven hundred six million, six hundred seven thousand, eight hundred forty-nine".