165145623128 has 8 divisors (see below), whose sum is σ = 309648043380. Its totient is φ = 82572811560.

The previous prime is 165145623113. The next prime is 165145623199. The reversal of 165145623128 is 821326541561.

165145623128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10321601438 + ... + 10321601453.

Almost surely, 2^165145623128 is an apocalyptic number.

It is an amenable number.

165145623128 is a deficient number, since it is larger than the sum of its proper divisors (144502420252).

165145623128 is a wasteful number, since it uses less digits than its factorization.

165145623128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20643202897 (or 20643202893 counting only the distinct ones).

The product of its digits is 345600, while the sum is 44.

The spelling of 165145623128 in words is "one hundred sixty-five billion, one hundred forty-five million, six hundred twenty-three thousand, one hundred twenty-eight".