165117162220 has 12 divisors (see below), whose sum is σ = 346746040704. Its totient is φ = 66046864880.

The previous prime is 165117162211. The next prime is 165117162227. The reversal of 165117162220 is 22261711561.

It is not an unprimeable number, because it can be changed into a prime (165117162227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4127929036 + ... + 4127929075.

It is an arithmetic number, because the mean of its divisors is an integer number (28895503392).

Almost surely, 2^165117162220 is an apocalyptic number.

165117162220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165117162220 is an abundant number, since it is smaller than the sum of its proper divisors (181628878484).

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

165117162220 is a wasteful number, since it uses less digits than its factorization.

165117162220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8255858120 (or 8255858118 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

Adding to 165117162220 its reverse (22261711561), we get a palindrome (187378873781).

The spelling of 165117162220 in words is "one hundred sixty-five billion, one hundred seventeen million, one hundred sixty-two thousand, two hundred twenty".