165771099480 has 128 divisors (see below), whose sum is σ = 568704614400. Its totient is φ = 37867433472.

The previous prime is 165771099449. The next prime is 165771099491. The reversal of 165771099480 is 84990177561.

165771099480 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 165771099480.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1337586 + ... + 1456254.

It is an arithmetic number, because the mean of its divisors is an integer number (4443004800).

Almost surely, 2^165771099480 is an apocalyptic number.

165771099480 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 165771099480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284352307200).

165771099480 is an abundant number, since it is smaller than the sum of its proper divisors (402933514920).

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

165771099480 is a wasteful number, since it uses less digits than its factorization.

165771099480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120353 (or 120349 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 57.

The spelling of 165771099480 in words is "one hundred sixty-five billion, seven hundred seventy-one million, ninety-nine thousand, four hundred eighty".