165145623137 has 4 divisors (see below), whose sum is σ = 180158861616. Its totient is φ = 150132384660.

The previous prime is 165145623113. The next prime is 165145623199. The reversal of 165145623137 is 731326541561.

165145623137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 165145623137 - 2¹⁰ = 165145622113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165145629137) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 7506619223 + ... + 7506619244.

It is an arithmetic number, because the mean of its divisors is an integer number (45039715404).

Almost surely, 2^165145623137 is an apocalyptic number.

It is an amenable number.

165145623137 is a deficient number, since it is larger than the sum of its proper divisors (15013238479).

165145623137 is a wasteful number, since it uses less digits than its factorization.

165145623137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15013238478.

The product of its digits is 453600, while the sum is 44.

The spelling of 165145623137 in words is "one hundred sixty-five billion, one hundred forty-five million, six hundred twenty-three thousand, one hundred thirty-seven".