320400515005 has 8 divisors (see below), whose sum is σ = 384626657592. Its totient is φ = 256223052288.

The previous prime is 320400514997. The next prime is 320400515011. The reversal of 320400515005 is 500515004023.

It can be written as a sum of positive squares in 4 ways, for example, as 2280826564 + 318119688441 = 47758^2 + 564021^2 .

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 320400515005 - 2³ = 320400514997 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 12155484 + ... + 12181813.

It is an arithmetic number, because the mean of its divisors is an integer number (48078332199).

Almost surely, 2^320400515005 is an apocalyptic number.

It is an amenable number.

320400515005 is a deficient number, since it is larger than the sum of its proper divisors (64226142587).

320400515005 is a wasteful number, since it uses less digits than its factorization.

320400515005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24339935.

The product of its (nonzero) digits is 3000, while the sum is 25.

Adding to 320400515005 its reverse (500515004023), we get a palindrome (820915519028).

The spelling of 320400515005 in words is "three hundred twenty billion, four hundred million, five hundred fifteen thousand, five".