165688209106 has 16 divisors (see below), whose sum is σ = 284495808960. Its totient is φ = 70894512720.

The previous prime is 165688209101. The next prime is 165688209107. The reversal of 165688209106 is 601902886561.

It is not an unprimeable number, because it can be changed into a prime (165688209101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9551005 + ... + 9568336.

It is an arithmetic number, because the mean of its divisors is an integer number (17780988060).

Almost surely, 2^165688209106 is an apocalyptic number.

165688209106 is a deficient number, since it is larger than the sum of its proper divisors (118807599854).

165688209106 is a wasteful number, since it uses less digits than its factorization.

165688209106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19119969.

The product of its (nonzero) digits is 1244160, while the sum is 52.

The spelling of 165688209106 in words is "one hundred sixty-five billion, six hundred eighty-eight million, two hundred nine thousand, one hundred six".