320046554581 has 16 divisors (see below), whose sum is σ = 357938002800. Its totient is φ = 284130459648.

The previous prime is 320046554483. The next prime is 320046554603. The reversal of 320046554581 is 185455640023.

It can be written as a sum of positive squares in 8 ways, for example, as 1940402500 + 318106152081 = 44050^2 + 564009^2 .

It is a cyclic number.

It is not a de Polignac number, because 320046554581 - 2¹⁷ = 320046423509 is a prime.

It is a super-5 number, since 5×320046554581⁵ (a number of 59 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320046555581) 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, 1554726 + ... + 1748503.

It is an arithmetic number, because the mean of its divisors is an integer number (22371125175).

Almost surely, 2^320046554581 is an apocalyptic number.

It is an amenable number.

320046554581 is a deficient number, since it is larger than the sum of its proper divisors (37891448219).

320046554581 is a wasteful number, since it uses less digits than its factorization.

320046554581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3303528.

The product of its (nonzero) digits is 576000, while the sum is 43.

The spelling of 320046554581 in words is "three hundred twenty billion, forty-six million, five hundred fifty-four thousand, five hundred eighty-one".