16856454303 has 12 divisors (see below), whose sum is σ = 26221151320. Its totient is φ = 10373202576.

The previous prime is 16856454253. The next prime is 16856454317. The reversal of 16856454303 is 30345465861.

16856454303 is a `hidden beast` number, since 1 + 6 + 8 + 564 + 54 + 30 + 3 = 666.

It is not a de Polignac number, because 16856454303 - 2⁶ = 16856454239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16856456303) 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, 72036013 + ... + 72036246.

Almost surely, 2^16856454303 is an apocalyptic number.

16856454303 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

16856454303 is a deficient number, since it is larger than the sum of its proper divisors (9364697017).

16856454303 is a wasteful number, since it uses less digits than its factorization.

16856454303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144072278 (or 144072275 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 16856454303 in words is "sixteen billion, eight hundred fifty-six million, four hundred fifty-four thousand, three hundred three".