320487716506 has 8 divisors (see below), whose sum is σ = 509009902740. Its totient is φ = 150817748928.

The previous prime is 320487716503. The next prime is 320487716513. The reversal of 320487716506 is 605617784023.

It can be written as a sum of positive squares in 2 ways, for example, as 312195975025 + 8291741481 = 558745^2 + 91059^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 320487716506.

It is not an unprimeable number, because it can be changed into a prime (320487716503) 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, 4713054621 + ... + 4713054688.

Almost surely, 2^320487716506 is an apocalyptic number.

320487716506 is a deficient number, since it is larger than the sum of its proper divisors (188522186234).

320487716506 is a wasteful number, since it uses less digits than its factorization.

320487716506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9426109328.

The product of its (nonzero) digits is 1693440, while the sum is 49.

The spelling of 320487716506 in words is "three hundred twenty billion, four hundred eighty-seven million, seven hundred sixteen thousand, five hundred six".