163921605119 has 8 divisors (see below), whose sum is σ = 172553322240. Its totient is φ = 155290314456.

The previous prime is 163921605083. The next prime is 163921605139. The reversal of 163921605119 is 911506129361.

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 163921605119 - 2¹⁶ = 163921539583 is a prime.

It is a super-4 number, since 4×163921605119⁴ (a number of 46 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 163921605119.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163921605139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 951992 + ... + 1110914.

It is an arithmetic number, because the mean of its divisors is an integer number (21569165280).

Almost surely, 2^163921605119 is an apocalyptic number.

163921605119 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

163921605119 is a deficient number, since it is larger than the sum of its proper divisors (8631717121).

163921605119 is a wasteful number, since it uses less digits than its factorization.

163921605119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213229.

The product of its (nonzero) digits is 87480, while the sum is 44.

The spelling of 163921605119 in words is "one hundred sixty-three billion, nine hundred twenty-one million, six hundred five thousand, one hundred nineteen".