16863445838 has 4 divisors (see below), whose sum is σ = 25295168760. Its totient is φ = 8431722918.

The previous prime is 16863445789. The next prime is 16863445847. The reversal of 16863445838 is 83854436861.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4215861458 + ... + 4215861461.

It is an arithmetic number, because the mean of its divisors is an integer number (6323792190).

Almost surely, 2^16863445838 is an apocalyptic number.

16863445838 is a deficient number, since it is larger than the sum of its proper divisors (8431722922).

16863445838 is an equidigital number, since it uses as much as digits as its factorization.

16863445838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8431722921.

The product of its digits is 13271040, while the sum is 56.

The spelling of 16863445838 in words is "sixteen billion, eight hundred sixty-three million, four hundred forty-five thousand, eight hundred thirty-eight".