853622009856 has 468 divisors, whose sum is σ = 3129110289864. Its totient is φ = 221714841600.

The previous prime is 853622009837. The next prime is 853622009893. The reversal of 853622009856 is 658900226358.

853622009856 is a `hidden beast` number, since 8 + 5 + 3 + 622 + 0 + 0 + 9 + 8 + 5 + 6 = 666.

It is a super-2 number, since 2×853622009856² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 19848216 + ... + 19891176.

It is an arithmetic number, because the mean of its divisors is an integer number (6686133098).

Almost surely, 2^853622009856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 853622009856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1564555144932).

853622009856 is an abundant number, since it is smaller than the sum of its proper divisors (2275488280008).

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

853622009856 is a wasteful number, since it uses less digits than its factorization.

853622009856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43016 (or 42984 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 54.

The spelling of 853622009856 in words is "eight hundred fifty-three billion, six hundred twenty-two million, nine thousand, eight hundred fifty-six".