645053165613513 has 12 divisors (see below), whose sum is σ = 931743692455680. Its totient is φ = 430035337120536.

The previous prime is 645053165613499. The next prime is 645053165613599. The reversal of 645053165613513 is 315316561350546.

645053165613513 is a `hidden beast` number, since 6 + 4 + 5 + 0 + 5 + 3 + 1 + 6 + 5 + 613 + 5 + 13 = 666.

It is not a de Polignac number, because 645053165613513 - 2²² = 645053161419209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 645053165613513.

It is not an unprimeable number, because it can be changed into a prime (645053165615513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49903120 + ... + 61485182.

It is an arithmetic number, because the mean of its divisors is an integer number (77645307704640).

Almost surely, 2^{645053165613513} is an apocalyptic number.

It is an amenable number.

645053165613513 is a deficient number, since it is larger than the sum of its proper divisors (286690526842167).

645053165613513 is a wasteful number, since it uses less digits than its factorization.

645053165613513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17770308 (or 17770305 counting only the distinct ones).

The product of its (nonzero) digits is 14580000, while the sum is 54.

The spelling of 645053165613513 in words is "six hundred forty-five trillion, fifty-three billion, one hundred sixty-five million, six hundred thirteen thousand, five hundred thirteen".