16860856320 has 1080 divisors, whose sum is σ = 76143168192. Its totient is φ = 3503554560.

The previous prime is 16860856297. The next prime is 16860856349. The reversal of 16860856320 is 2365806861.

16860856320 is a `hidden beast` number, since 1 + 6 + 8 + 6 + 0 + 8 + 5 + 632 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1080).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1532805115 + ... + 1532805125.

Almost surely, 2^16860856320 is an apocalyptic number.

16860856320 is a gapful number since it is divisible by the number (10) 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 16860856320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38071584096).

16860856320 is an abundant number, since it is smaller than the sum of its proper divisors (59282311872).

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

16860856320 is an frugal number, since it uses more digits than its factorization.

16860856320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77 (or 28 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 16860856320 in words is "sixteen billion, eight hundred sixty million, eight hundred fifty-six thousand, three hundred twenty".