165210220126 has 16 divisors (see below), whose sum is σ = 283262196960. Its totient is φ = 70793210880.

The previous prime is 165210220099. The next prime is 165210220141. The reversal of 165210220126 is 621022012561.

It is a junction number, because it is equal to n+sod(n) for n = 165210220094 and 165210220103.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 838531 + ... + 1016638.

It is an arithmetic number, because the mean of its divisors is an integer number (17703887310).

Almost surely, 2^165210220126 is an apocalyptic number.

165210220126 is a deficient number, since it is larger than the sum of its proper divisors (118051976834).

165210220126 is a wasteful number, since it uses less digits than its factorization.

165210220126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1861539.

The product of its (nonzero) digits is 2880, while the sum is 28.

Adding to 165210220126 its reverse (621022012561), we get a palindrome (786232232687).

The spelling of 165210220126 in words is "one hundred sixty-five billion, two hundred ten million, two hundred twenty thousand, one hundred twenty-six".