320555423541 has 16 divisors (see below), whose sum is σ = 429480181760. Its totient is φ = 212667839280.

The previous prime is 320555423537. The next prime is 320555423561. The reversal of 320555423541 is 145324555023.

It is not a de Polignac number, because 320555423541 - 2² = 320555423537 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 320555423541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320555423561) 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, 1781340 + ... + 1953018.

It is an arithmetic number, because the mean of its divisors is an integer number (26842511360).

Almost surely, 2^320555423541 is an apocalyptic number.

It is an amenable number.

320555423541 is a deficient number, since it is larger than the sum of its proper divisors (108924758219).

320555423541 is a wasteful number, since it uses less digits than its factorization.

320555423541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174696.

The product of its (nonzero) digits is 360000, while the sum is 39.

Adding to 320555423541 its reverse (145324555023), we get a palindrome (465879978564).

The spelling of 320555423541 in words is "three hundred twenty billion, five hundred fifty-five million, four hundred twenty-three thousand, five hundred forty-one".