165215510060550 has 48 divisors (see below), whose sum is σ = 409846080172032. Its totient is φ = 44045467712800.

The previous prime is 165215510060357. The next prime is 165215510060591. The reversal of 165215510060550 is 55060015512561.

165215510060550 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149467974 + ... + 150569273.

It is an arithmetic number, because the mean of its divisors is an integer number (8538460003584).

Almost surely, 2^{165215510060550} is an apocalyptic number.

165215510060550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165215510060550 is an abundant number, since it is smaller than the sum of its proper divisors (244630570111482).

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

165215510060550 is a wasteful number, since it uses less digits than its factorization.

165215510060550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300040933 (or 300040928 counting only the distinct ones).

The product of its (nonzero) digits is 225000, while the sum is 42.

The spelling of 165215510060550 in words is "one hundred sixty-five trillion, two hundred fifteen billion, five hundred ten million, sixty thousand, five hundred fifty".