163665342012 has 24 divisors (see below), whose sum is σ = 381994171776. Its totient is φ = 54539632048.

The previous prime is 163665341989. The next prime is 163665342017. The reversal of 163665342012 is 210243566361.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163665342017) 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, 1891158 + ... + 1975805.

It is an arithmetic number, because the mean of its divisors is an integer number (15916423824).

Almost surely, 2^163665342012 is an apocalyptic number.

163665342012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

163665342012 is an abundant number, since it is smaller than the sum of its proper divisors (218328829764).

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

163665342012 is a wasteful number, since it uses less digits than its factorization.

163665342012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3870497 (or 3870495 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 39.

The spelling of 163665342012 in words is "one hundred sixty-three billion, six hundred sixty-five million, three hundred forty-two thousand, twelve".