163491799679 has 8 divisors (see below), whose sum is σ = 186425038800. Its totient is φ = 142038124416.

The previous prime is 163491799673. The next prime is 163491799703. The reversal of 163491799679 is 976997194361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163491799679 - 2²⁴ = 163475022463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163491799673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 369890729 + ... + 369891170.

It is an arithmetic number, because the mean of its divisors is an integer number (23303129850).

Almost surely, 2^163491799679 is an apocalyptic number.

163491799679 is a deficient number, since it is larger than the sum of its proper divisors (22933239121).

163491799679 is a wasteful number, since it uses less digits than its factorization.

163491799679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739781929.

The product of its digits is 138883248, while the sum is 71.

The spelling of 163491799679 in words is "one hundred sixty-three billion, four hundred ninety-one million, seven hundred ninety-nine thousand, six hundred seventy-nine".