16856845776 has 60 divisors (see below), whose sum is σ = 48802518180. Its totient is φ = 5425190400.

The previous prime is 16856845717. The next prime is 16856845777. The reversal of 16856845776 is 67754865861.

16856845776 is a `hidden beast` number, since 1 + 6 + 8 + 56 + 8 + 4 + 577 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7881178176 + 8975667600 = 88776^2 + 94740^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16856845777) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2014125 + ... + 2022476.

It is an arithmetic number, because the mean of its divisors is an integer number (813375303).

Almost surely, 2^16856845776 is an apocalyptic number.

16856845776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16856845776 is an abundant number, since it is smaller than the sum of its proper divisors (31945672404).

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

16856845776 is a wasteful number, since it uses less digits than its factorization.

16856845776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4036644 (or 4036635 counting only the distinct ones).

The product of its digits is 67737600, while the sum is 63.

The spelling of 16856845776 in words is "sixteen billion, eight hundred fifty-six million, eight hundred forty-five thousand, seven hundred seventy-six".