165320820322 has 16 divisors (see below), whose sum is σ = 283903468992. Its totient is φ = 70727693040.

The previous prime is 165320820307. The next prime is 165320820337. The reversal of 165320820322 is 223028023561.

It is an interprime number because it is at equal distance from previous prime (165320820307) and next prime (165320820337).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10332313 + ... + 10348300.

It is an arithmetic number, because the mean of its divisors is an integer number (17743966812).

Almost surely, 2^165320820322 is an apocalyptic number.

165320820322 is a deficient number, since it is larger than the sum of its proper divisors (118582648670).

165320820322 is a wasteful number, since it uses less digits than its factorization.

165320820322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20681193.

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 165320820322 its reverse (223028023561), we get a palindrome (388348843883).

The spelling of 165320820322 in words is "one hundred sixty-five billion, three hundred twenty million, eight hundred twenty thousand, three hundred twenty-two".