161132235711523 has 16 divisors (see below), whose sum is σ = 172013438903040. Its totient is φ = 150491379578400.

The previous prime is 161132235711481. The next prime is 161132235711533. The reversal of 161132235711523 is 325117532231161.

It is a cyclic number.

It is not a de Polignac number, because 161132235711523 - 2⁹ = 161132235711011 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161132235711523.

It is not an unprimeable number, because it can be changed into a prime (161132235711533) 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, 15925008 + ... + 23997298.

It is an arithmetic number, because the mean of its divisors is an integer number (10750839931440).

Almost surely, 2^{161132235711523} is an apocalyptic number.

161132235711523 is a deficient number, since it is larger than the sum of its proper divisors (10881203191517).

161132235711523 is a wasteful number, since it uses less digits than its factorization.

161132235711523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8087178.

The product of its digits is 226800, while the sum is 43.

Adding to 161132235711523 its reverse (325117532231161), we get a palindrome (486249767942684).

The spelling of 161132235711523 in words is "one hundred sixty-one trillion, one hundred thirty-two billion, two hundred thirty-five million, seven hundred eleven thousand, five hundred twenty-three".