165448442880 has 1056 divisors, whose sum is σ = 708150643200. Its totient is φ = 34879832064.

The previous prime is 165448442867. The next prime is 165448442881. The reversal of 165448442880 is 88244844561.

165448442880 is a `hidden beast` number, since 1 + 65 + 4 + 4 + 84 + 428 + 80 = 666.

It is not an unprimeable number, because it can be changed into a prime (165448442881) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 215147136 + ... + 215147904.

It is an arithmetic number, because the mean of its divisors is an integer number (670597200).

Almost surely, 2^165448442880 is an apocalyptic number.

165448442880 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 165448442880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (354075321600).

165448442880 is an abundant number, since it is smaller than the sum of its proper divisors (542702200320).

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

165448442880 is a wasteful number, since it uses less digits than its factorization.

165448442880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859 (or 838 counting only the distinct ones).

The product of its (nonzero) digits is 7864320, while the sum is 54.

The spelling of 165448442880 in words is "one hundred sixty-five billion, four hundred forty-eight million, four hundred forty-two thousand, eight hundred eighty".