165304390912 has 18 divisors (see below), whose sum is σ = 329963062058. Its totient is φ = 82652195328.

The previous prime is 165304390891. The next prime is 165304390931. The reversal of 165304390912 is 219093403561.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 163422913536 + 1881477376 = 404256^2 + 43376^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322859883 + ... + 322860394.

Almost surely, 2^165304390912 is an apocalyptic number.

It is an amenable number.

165304390912 is a deficient number, since it is larger than the sum of its proper divisors (164658671146).

165304390912 is an frugal number, since it uses more digits than its factorization.

165304390912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645720293 (or 645720279 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 43.

The spelling of 165304390912 in words is "one hundred sixty-five billion, three hundred four million, three hundred ninety thousand, nine hundred twelve".