165550489563712 has 336 divisors, whose sum is σ = 388098270060480. Its totient is φ = 69293939097600.

The previous prime is 165550489563671. The next prime is 165550489563761. The reversal of 165550489563712 is 217365984055561.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21113436912 + ... + 21113444752.

It is an arithmetic number, because the mean of its divisors is an integer number (1155054375180).

It is a 1-persistent number, because it is pandigital, but 2⋅165550489563712 = 331100979127424 is not.

Almost surely, 2^{165550489563712} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165550489563712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194049135030240).

165550489563712 is an abundant number, since it is smaller than the sum of its proper divisors (222547780496768).

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

165550489563712 is a wasteful number, since it uses less digits than its factorization.

165550489563712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9110 (or 9063 counting only the distinct ones).

The product of its (nonzero) digits is 272160000, while the sum is 67.

The spelling of 165550489563712 in words is "one hundred sixty-five trillion, five hundred fifty billion, four hundred eighty-nine million, five hundred sixty-three thousand, seven hundred twelve".