320161621623 has 4 divisors (see below), whose sum is σ = 426882162168. Its totient is φ = 213441081080.

The previous prime is 320161621621. The next prime is 320161621643. The reversal of 320161621623 is 326126161023.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 320161621623 - 2¹ = 320161621621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320161621621) 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, 53360270268 + ... + 53360270273.

It is an arithmetic number, because the mean of its divisors is an integer number (106720540542).

Almost surely, 2^320161621623 is an apocalyptic number.

320161621623 is a deficient number, since it is larger than the sum of its proper divisors (106720540545).

320161621623 is a wasteful number, since it uses less digits than its factorization.

320161621623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106720540544.

The product of its (nonzero) digits is 15552, while the sum is 33.

Adding to 320161621623 its reverse (326126161023), we get a palindrome (646287782646).

The spelling of 320161621623 in words is "three hundred twenty billion, one hundred sixty-one million, six hundred twenty-one thousand, six hundred twenty-three".