163143220420509 has 64 divisors (see below), whose sum is σ = 250503857736192. Its totient is φ = 92513304576000.

The previous prime is 163143220420471. The next prime is 163143220420561. The reversal of 163143220420509 is 905024022341361.

It is not a de Polignac number, because 163143220420509 - 2¹⁶ = 163143220354973 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163143220420709) 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, 12946840809 + ... + 12946853409.

It is an arithmetic number, because the mean of its divisors is an integer number (3914122777128).

Almost surely, 2^{163143220420509} is an apocalyptic number.

It is an amenable number.

163143220420509 is a deficient number, since it is larger than the sum of its proper divisors (87360637315683).

163143220420509 is a wasteful number, since it uses less digits than its factorization.

163143220420509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21686.

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 163143220420509 in words is "one hundred sixty-three trillion, one hundred forty-three billion, two hundred twenty million, four hundred twenty thousand, five hundred nine".