16863071643 has 64 divisors (see below), whose sum is σ = 28175400960. Its totient is φ = 9875325600.

The previous prime is 16863071633. The next prime is 16863071663. The reversal of 16863071643 is 34617036861.

16863071643 is a `hidden beast` number, since 1 + 6 + 8 + 630 + 7 + 1 + 6 + 4 + 3 = 666.

It is not a de Polignac number, because 16863071643 - 2⁴ = 16863071627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16863071633) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9786180 + ... + 9787902.

It is an arithmetic number, because the mean of its divisors is an integer number (440240640).

Almost surely, 2^16863071643 is an apocalyptic number.

16863071643 is a deficient number, since it is larger than the sum of its proper divisors (11312329317).

16863071643 is a wasteful number, since it uses less digits than its factorization.

16863071643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2837 (or 2831 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 16863071643 in words is "sixteen billion, eight hundred sixty-three million, seventy-one thousand, six hundred forty-three".