163705441620 has 384 divisors, whose sum is σ = 573253632000. Its totient is φ = 34765645824.

The previous prime is 163705441619. The next prime is 163705441621. The reversal of 163705441620 is 26144507361.

It is a happy number.

163705441620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (163705441619) and next prime (163705441621).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163705441621) 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 127 ways as a sum of consecutive naturals, for example, 27635979 + ... + 27641901.

It is an arithmetic number, because the mean of its divisors is an integer number (1492848000).

Almost surely, 2^163705441620 is an apocalyptic number.

163705441620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163705441620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286626816000).

163705441620 is an abundant number, since it is smaller than the sum of its proper divisors (409548190380).

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

163705441620 is a wasteful number, since it uses less digits than its factorization.

163705441620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6052 (or 6036 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

Adding to 163705441620 its reverse (26144507361), we get a palindrome (189849948981).

The spelling of 163705441620 in words is "one hundred sixty-three billion, seven hundred five million, four hundred forty-one thousand, six hundred twenty".