161303465321 has 4 divisors (see below), whose sum is σ = 166506802944. Its totient is φ = 156100127700.

The previous prime is 161303465237. The next prime is 161303465333. The reversal of 161303465321 is 123564303161.

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 161303465321 - 2¹⁰ = 161303464297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161303495321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2601668765 + ... + 2601668826.

It is an arithmetic number, because the mean of its divisors is an integer number (41626700736).

Almost surely, 2^161303465321 is an apocalyptic number.

It is an amenable number.

161303465321 is a deficient number, since it is larger than the sum of its proper divisors (5203337623).

161303465321 is an equidigital number, since it uses as much as digits as its factorization.

161303465321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5203337622.

The product of its (nonzero) digits is 38880, while the sum is 35.

Adding to 161303465321 its reverse (123564303161), we get a palindrome (284867768482).

The spelling of 161303465321 in words is "one hundred sixty-one billion, three hundred three million, four hundred sixty-five thousand, three hundred twenty-one".