645413314545 has 32 divisors (see below), whose sum is σ = 1156160269440. Its totient is φ = 341592788160.

The previous prime is 645413314529. The next prime is 645413314619. The reversal of 645413314545 is 545413314546.

645413314545 is a `hidden beast` number, since 6 + 454 + 13 + 3 + 145 + 45 = 666.

It is not a de Polignac number, because 645413314545 - 2⁴ = 645413314529 is a prime.

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 645413314545.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18229794 + ... + 18265163.

It is an arithmetic number, because the mean of its divisors is an integer number (36130008420).

Almost surely, 2^645413314545 is an apocalyptic number.

It is an amenable number.

645413314545 is a deficient number, since it is larger than the sum of its proper divisors (510746954895).

645413314545 is a wasteful number, since it uses less digits than its factorization.

645413314545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36495102 (or 36495096 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 45.

Subtracting from 645413314545 its reverse (545413314546), we obtain a palindrome (99999999999).

The spelling of 645413314545 in words is "six hundred forty-five billion, four hundred thirteen million, three hundred fourteen thousand, five hundred forty-five".