16856718730 has 32 divisors (see below), whose sum is σ = 32810489856. Its totient is φ = 6211033344.

The previous prime is 16856718643. The next prime is 16856718761. The reversal of 16856718730 is 3781765861.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1046874 + ... + 1062853.

It is an arithmetic number, because the mean of its divisors is an integer number (1025327808).

Almost surely, 2^16856718730 is an apocalyptic number.

16856718730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16856718730 is a deficient number, since it is larger than the sum of its proper divisors (15953771126).

16856718730 is a wasteful number, since it uses less digits than its factorization.

16856718730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2109798.

The product of its (nonzero) digits is 1693440, while the sum is 52.

The spelling of 16856718730 in words is "sixteen billion, eight hundred fifty-six million, seven hundred eighteen thousand, seven hundred thirty".