165550212300 has 72 divisors (see below), whose sum is σ = 522536680512. Its totient is φ = 40133384000.

The previous prime is 165550212211. The next prime is 165550212323. The reversal of 165550212300 is 3212055561.

It is a happy number.

165550212300 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 23 ways as a sum of consecutive naturals, for example, 25080066 + ... + 25086665.

It is an arithmetic number, because the mean of its divisors is an integer number (7257453896).

Almost surely, 2^165550212300 is an apocalyptic number.

165550212300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165550212300 is an abundant number, since it is smaller than the sum of its proper divisors (356986468212).

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

165550212300 is a wasteful number, since it uses less digits than its factorization.

165550212300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50166759 (or 50166752 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 165550212300 its reverse (3212055561), we get a palindrome (168762267861).

The spelling of 165550212300 in words is "one hundred sixty-five billion, five hundred fifty million, two hundred twelve thousand, three hundred".