858120420615860 has 12 divisors (see below), whose sum is σ = 1802052883293348. Its totient is φ = 343248168246336.

The previous prime is 858120420615797. The next prime is 858120420615863. The reversal of 858120420615860 is 68516024021858.

858120420615860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 219761590112164 + 638358830503696 = 14824358^2 + 25265764^2 .

It is a junction number, because it is equal to n+sod(n) for n = 858120420615796 and 858120420615805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (858120420615863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21453010515377 + ... + 21453010515416.

It is an arithmetic number, because the mean of its divisors is an integer number (150171073607779).

Almost surely, 2^{858120420615860} is an apocalyptic number.

It is an amenable number.

858120420615860 is an abundant number, since it is smaller than the sum of its proper divisors (943932462677488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

858120420615860 is a wasteful number, since it uses less digits than its factorization.

858120420615860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42906021030802 (or 42906021030800 counting only the distinct ones).

The product of its (nonzero) digits is 7372800, while the sum is 56.

The spelling of 858120420615860 in words is "eight hundred fifty-eight trillion, one hundred twenty billion, four hundred twenty million, six hundred fifteen thousand, eight hundred sixty".