165505916552 has 32 divisors (see below), whose sum is σ = 318416555520. Its totient is φ = 80601490560.

The previous prime is 165505916519. The next prime is 165505916581. The reversal of 165505916552 is 255619505561.

165505916552 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 165505916552.

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 7 ways as a sum of consecutive naturals, for example, 216548 + ... + 614739.

It is an arithmetic number, because the mean of its divisors is an integer number (9950517360).

Almost surely, 2^165505916552 is an apocalyptic number.

It is an amenable number.

165505916552 is a deficient number, since it is larger than the sum of its proper divisors (152910638968).

165505916552 is a wasteful number, since it uses less digits than its factorization.

165505916552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831941 (or 831937 counting only the distinct ones).

The product of its (nonzero) digits is 2025000, while the sum is 50.

The spelling of 165505916552 in words is "one hundred sixty-five billion, five hundred five million, nine hundred sixteen thousand, five hundred fifty-two".