320544005134545 has 96 divisors (see below), whose sum is σ = 593335022911488. Its totient is φ = 159697989247104.

The previous prime is 320544005134541. The next prime is 320544005134547. The reversal of 320544005134545 is 545431500445023.

320544005134545 is a `hidden beast` number, since 3 + 2 + 0 + 54 + 4 + 0 + 0 + 51 + 3 + 4 + 545 = 666.

It is not a de Polignac number, because 320544005134545 - 2² = 320544005134541 is a prime.

It is a super-2 number, since 2×320544005134545² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 320544005134545.

It is not an unprimeable number, because it can be changed into a prime (320544005134541) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 310262704 + ... + 311294126.

It is an arithmetic number, because the mean of its divisors is an integer number (6180573155328).

Almost surely, 2^{320544005134545} is an apocalyptic number.

It is an amenable number.

320544005134545 is a deficient number, since it is larger than the sum of its proper divisors (272791017776943).

320544005134545 is a wasteful number, since it uses less digits than its factorization.

320544005134545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038483 (or 1038480 counting only the distinct ones).

The product of its (nonzero) digits is 2880000, while the sum is 45.

Adding to 320544005134545 its reverse (545431500445023), we get a palindrome (865975505579568).

The spelling of 320544005134545 in words is "three hundred twenty trillion, five hundred forty-four billion, five million, one hundred thirty-four thousand, five hundred forty-five".