163966821839230 has 128 divisors (see below), whose sum is σ = 303088152084480. Its totient is φ = 63849272647680.

The previous prime is 163966821839213. The next prime is 163966821839231. The reversal of 163966821839230 is 32938128669361.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163966821839231) 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, 45762438019 + ... + 45762441601.

It is an arithmetic number, because the mean of its divisors is an integer number (2367876188160).

Almost surely, 2^{163966821839230} is an apocalyptic number.

163966821839230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

163966821839230 is a deficient number, since it is larger than the sum of its proper divisors (139121330245250).

163966821839230 is a wasteful number, since it uses less digits than its factorization.

163966821839230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5834.

The product of its (nonzero) digits is 120932352, while the sum is 67.

The spelling of 163966821839230 in words is "one hundred sixty-three trillion, nine hundred sixty-six billion, eight hundred twenty-one million, eight hundred thirty-nine thousand, two hundred thirty".