165623131611523 has 8 divisors (see below), whose sum is σ = 175366102249728. Its totient is φ = 155880209138304.

The previous prime is 165623131611521. The next prime is 165623131611563. The reversal of 165623131611523 is 325116131326561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165623131611523 - 2¹ = 165623131611521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165623131611521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4838536 + ... + 18832357.

It is an arithmetic number, because the mean of its divisors is an integer number (21920762781216).

Almost surely, 2^{165623131611523} is an apocalyptic number.

165623131611523 is a deficient number, since it is larger than the sum of its proper divisors (9742970638205).

165623131611523 is a wasteful number, since it uses less digits than its factorization.

165623131611523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24082493.

The product of its digits is 583200, while the sum is 46.

The spelling of 165623131611523 in words is "one hundred sixty-five trillion, six hundred twenty-three billion, one hundred thirty-one million, six hundred eleven thousand, five hundred twenty-three".