163550404660 has 48 divisors (see below), whose sum is σ = 352693771920. Its totient is φ = 63668367360.

The previous prime is 163550404597. The next prime is 163550404679. The reversal of 163550404660 is 66404055361.

It can be written as a sum of positive squares in 8 ways, for example, as 25454926116 + 138095478544 = 159546^2 + 371612^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91552 + ... + 579208.

It is an arithmetic number, because the mean of its divisors is an integer number (7347786915).

Almost surely, 2^163550404660 is an apocalyptic number.

163550404660 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 163550404660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176346885960).

163550404660 is an abundant number, since it is smaller than the sum of its proper divisors (189143367260).

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

163550404660 is a wasteful number, since it uses less digits than its factorization.

163550404660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488116 (or 488114 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 163550404660 in words is "one hundred sixty-three billion, five hundred fifty million, four hundred four thousand, six hundred sixty".