320513444545 has 48 divisors (see below), whose sum is σ = 452847507840. Its totient is φ = 217120248576.

The previous prime is 320513444509. The next prime is 320513444579. The reversal of 320513444545 is 545444315023.

It is not a de Polignac number, because 320513444545 - 2⁹ = 320513444033 is a prime.

It is a super-4 number, since 4×320513444545⁴ (a number of 47 digits) contains 4444 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 320513444498 and 320513444507.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10558309 + ... + 10588621.

It is an arithmetic number, because the mean of its divisors is an integer number (9434323080).

Almost surely, 2^320513444545 is an apocalyptic number.

320513444545 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

320513444545 is a deficient number, since it is larger than the sum of its proper divisors (132334063295).

320513444545 is a wasteful number, since it uses less digits than its factorization.

320513444545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30854 (or 30847 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 40.

Adding to 320513444545 its reverse (545444315023), we get a palindrome (865957759568).

The spelling of 320513444545 in words is "three hundred twenty billion, five hundred thirteen million, four hundred forty-four thousand, five hundred forty-five".