16856077172 has 12 divisors (see below), whose sum is σ = 32179783776. Its totient is φ = 7661853240.

The previous prime is 16856077171. The next prime is 16856077213. The reversal of 16856077172 is 27177065861.

It is a self number, because there is not a number n which added to its sum of digits gives 16856077172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16856077171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191546288 + ... + 191546375.

It is an arithmetic number, because the mean of its divisors is an integer number (2681648648).

Almost surely, 2^16856077172 is an apocalyptic number.

It is an amenable number.

16856077172 is a deficient number, since it is larger than the sum of its proper divisors (15323706604).

16856077172 is a wasteful number, since it uses less digits than its factorization.

16856077172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383092678 (or 383092676 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 50.

The spelling of 16856077172 in words is "sixteen billion, eight hundred fifty-six million, seventy-seven thousand, one hundred seventy-two".