163986853905930 has 32 divisors (see below), whose sum is σ = 429347399318208. Its totient is φ = 39754388825600.

The previous prime is 163986853905913. The next prime is 163986853905937. The reversal of 163986853905930 is 39509358689361.

It is not an unprimeable number, because it can be changed into a prime (163986853905937) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 248464929831 + ... + 248464930490.

It is an arithmetic number, because the mean of its divisors is an integer number (13417106228694).

Almost surely, 2^{163986853905930} is an apocalyptic number.

163986853905930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

163986853905930 is an abundant number, since it is smaller than the sum of its proper divisors (265360545412278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163986853905930 is a wasteful number, since it uses less digits than its factorization.

163986853905930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496929860342.

The product of its (nonzero) digits is 1133740800, while the sum is 75.

The spelling of 163986853905930 in words is "one hundred sixty-three trillion, nine hundred eighty-six billion, eight hundred fifty-three million, nine hundred five thousand, nine hundred thirty".