858989968560 has 320 divisors, whose sum is σ = 3150312652800. Its totient is φ = 214383587328.

The previous prime is 858989968549. The next prime is 858989968561. The reversal of 858989968560 is 65869989858.

It is a self number, because there is not a number n which added to its sum of digits gives 858989968560.

It is not an unprimeable number, because it can be changed into a prime (858989968561) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6507537 + ... + 6638223.

It is an arithmetic number, because the mean of its divisors is an integer number (9844727040).

Almost surely, 2^858989968560 is an apocalyptic number.

858989968560 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 858989968560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1575156326400).

858989968560 is an abundant number, since it is smaller than the sum of its proper divisors (2291322684240).

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

858989968560 is a wasteful number, since it uses less digits than its factorization.

858989968560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130905 (or 130893 counting only the distinct ones).

The product of its (nonzero) digits is 2687385600, while the sum is 81.

The spelling of 858989968560 in words is "eight hundred fifty-eight billion, nine hundred eighty-nine million, nine hundred sixty-eight thousand, five hundred sixty".