163550441518420 has 96 divisors (see below), whose sum is σ = 381804715345536. Its totient is φ = 58342182412800.

The previous prime is 163550441518393. The next prime is 163550441518421. The reversal of 163550441518420 is 24815144055361.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163550441518421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78575530 + ... + 80630110.

It is an arithmetic number, because the mean of its divisors is an integer number (3977132451516).

Almost surely, 2^{163550441518420} is an apocalyptic number.

163550441518420 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 163550441518420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190902357672768).

163550441518420 is an abundant number, since it is smaller than the sum of its proper divisors (218254273827116).

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

163550441518420 is a wasteful number, since it uses less digits than its factorization.

163550441518420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2061481 (or 2061479 counting only the distinct ones).

The product of its (nonzero) digits is 2304000, while the sum is 49.

The spelling of 163550441518420 in words is "one hundred sixty-three trillion, five hundred fifty billion, four hundred forty-one million, five hundred eighteen thousand, four hundred twenty".