320560243653545 has 8 divisors (see below), whose sum is σ = 439625477010624. Its totient is φ = 219812738505264.

The previous prime is 320560243653499. The next prime is 320560243653547. The reversal of 320560243653545 is 545356342065023.

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 320560243653545 - 2²⁶ = 320560176544681 is a prime.

It is a super-2 number, since 2×320560243653545² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320560243653547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4579432052159 + ... + 4579432052228.

It is an arithmetic number, because the mean of its divisors is an integer number (54953184626328).

Almost surely, 2^{320560243653545} is an apocalyptic number.

320560243653545 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

320560243653545 is a deficient number, since it is larger than the sum of its proper divisors (119065233357079).

320560243653545 is an equidigital number, since it uses as much as digits as its factorization.

320560243653545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9158864104399.

The product of its (nonzero) digits is 38880000, while the sum is 53.

The spelling of 320560243653545 in words is "three hundred twenty trillion, five hundred sixty billion, two hundred forty-three million, six hundred fifty-three thousand, five hundred forty-five".