320005555555 has 8 divisors (see below), whose sum is σ = 438864761952. Its totient is φ = 219432380928.

The previous prime is 320005555487. The next prime is 320005555577. The reversal of 320005555555 is 555555500023.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 320005555555 - 2¹⁵ = 320005522787 is a prime.

It is a Duffinian number.

320005555555 is a modest number, since divided by 555555 gives 320005 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4571507902 + ... + 4571507971.

It is an arithmetic number, because the mean of its divisors is an integer number (54858095244).

Almost surely, 2^320005555555 is an apocalyptic number.

320005555555 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

320005555555 is a deficient number, since it is larger than the sum of its proper divisors (118859206397).

320005555555 is an equidigital number, since it uses as much as digits as its factorization.

320005555555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9143015885.

The product of its (nonzero) digits is 468750, while the sum is 40.

The spelling of 320005555555 in words is "three hundred twenty billion, five million, five hundred fifty-five thousand, five hundred fifty-five".