165975990144 has 64 divisors (see below), whose sum is σ = 441214965840. Its totient is φ = 55282507776.

The previous prime is 165975990133. The next prime is 165975990149. The reversal of 165975990144 is 441099579561.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165975990149) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 331422 + ... + 664674.

Almost surely, 2^165975990144 is an apocalyptic number.

It is an amenable number.

165975990144 is an abundant number, since it is smaller than the sum of its proper divisors (275238975696).

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

165975990144 is a wasteful number, since it uses less digits than its factorization.

165975990144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334567 (or 334555 counting only the distinct ones).

The product of its (nonzero) digits is 12247200, while the sum is 60.

The spelling of 165975990144 in words is "one hundred sixty-five billion, nine hundred seventy-five million, nine hundred ninety thousand, one hundred forty-four".