168646999803 has 4 divisors (see below), whose sum is σ = 224862666408. Its totient is φ = 112431333200.

The previous prime is 168646999789. The next prime is 168646999811. The reversal of 168646999803 is 308999646861.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168646999803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (168646999403) 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, 28107833298 + ... + 28107833303.

It is an arithmetic number, because the mean of its divisors is an integer number (56215666602).

Almost surely, 2^168646999803 is an apocalyptic number.

168646999803 is a deficient number, since it is larger than the sum of its proper divisors (56215666605).

168646999803 is an equidigital number, since it uses as much as digits as its factorization.

168646999803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56215666604.

The product of its (nonzero) digits is 120932352, while the sum is 69.

The spelling of 168646999803 in words is "one hundred sixty-eight billion, six hundred forty-six million, nine hundred ninety-nine thousand, eight hundred three".