165138087037 has 16 divisors (see below), whose sum is σ = 206184466944. Its totient is φ = 128492766000.

The previous prime is 165138087029. The next prime is 165138087043. The reversal of 165138087037 is 730780831561.

It is a cyclic number.

It is not a de Polignac number, because 165138087037 - 2³ = 165138087029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165138087337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1498639 + ... + 1605052.

It is an arithmetic number, because the mean of its divisors is an integer number (12886529184).

Almost surely, 2^165138087037 is an apocalyptic number.

It is an amenable number.

165138087037 is a deficient number, since it is larger than the sum of its proper divisors (41046379907).

165138087037 is a wasteful number, since it uses less digits than its factorization.

165138087037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3104400.

The product of its (nonzero) digits is 846720, while the sum is 49.

The spelling of 165138087037 in words is "one hundred sixty-five billion, one hundred thirty-eight million, eighty-seven thousand, thirty-seven".