858144112185261 has 16 divisors (see below), whose sum is σ = 1248210127802880. Its totient is φ = 520087128185520.

The previous prime is 858144112185133. The next prime is 858144112185287. The reversal of 858144112185261 is 162581211441858.

It is not a de Polignac number, because 858144112185261 - 2⁷ = 858144112185133 is a prime.

It is a super-2 number, since 2×858144112185261² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (858144112189261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122690280 + ... + 129495918.

It is an arithmetic number, because the mean of its divisors is an integer number (78013132987680).

Almost surely, 2^{858144112185261} is an apocalyptic number.

It is an amenable number.

858144112185261 is a deficient number, since it is larger than the sum of its proper divisors (390066015617619).

858144112185261 is a wasteful number, since it uses less digits than its factorization.

858144112185261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10626656.

The product of its digits is 4915200, while the sum is 57.

It can be divided in two parts, 8581441 and 12185261, that added together give a palindrome (20766702).

The spelling of 858144112185261 in words is "eight hundred fifty-eight trillion, one hundred forty-four billion, one hundred twelve million, one hundred eighty-five thousand, two hundred sixty-one".