163443440620 has 24 divisors (see below), whose sum is σ = 345028255488. Its totient is φ = 65035084800.

The previous prime is 163443440597. The next prime is 163443440647. The reversal of 163443440620 is 26044344361.

It is a self number, because there is not a number n which added to its sum of digits gives 163443440620.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21389301 + ... + 21396940.

It is an arithmetic number, because the mean of its divisors is an integer number (14376177312).

Almost surely, 2^163443440620 is an apocalyptic number.

163443440620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163443440620 is an abundant number, since it is smaller than the sum of its proper divisors (181584814868).

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

163443440620 is a wasteful number, since it uses less digits than its factorization.

163443440620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42786441 (or 42786439 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 37.

Adding to 163443440620 its reverse (26044344361), we get a palindrome (189487784981).

The spelling of 163443440620 in words is "one hundred sixty-three billion, four hundred forty-three million, four hundred forty thousand, six hundred twenty".