645413314505 has 8 divisors (see below), whose sum is σ = 775096835400. Its totient is φ = 515930079616.

The previous prime is 645413314487. The next prime is 645413314517. The reversal of 645413314505 is 505413314546.

645413314505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 189361614649 + 456051699856 = 435157^2 + 675316^2 .

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 645413314505 - 2²⁶ = 645346205641 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50064410 + ... + 50077299.

It is an arithmetic number, because the mean of its divisors is an integer number (96887104425).

Almost surely, 2^645413314505 is an apocalyptic number.

It is an amenable number.

645413314505 is a deficient number, since it is larger than the sum of its proper divisors (129683520895).

645413314505 is a wasteful number, since it uses less digits than its factorization.

645413314505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100143003.

The product of its (nonzero) digits is 432000, while the sum is 41.

Adding to 645413314505 its sum of digits (41), we get a palindrome (645413314546).

The spelling of 645413314505 in words is "six hundred forty-five billion, four hundred thirteen million, three hundred fourteen thousand, five hundred five".