63305513165 has 4 divisors (see below), whose sum is σ = 75966615804. Its totient is φ = 50644410528.

The previous prime is 63305513129. The next prime is 63305513213. The reversal of 63305513165 is 56131550336.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10319918569 + 52985594596 = 101587^2 + 230186^2 .

It is a cyclic number.

It is not a de Polignac number, because 63305513165 - 2²⁸ = 63037077709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6330551312 + ... + 6330551321.

It is an arithmetic number, because the mean of its divisors is an integer number (18991653951).

Almost surely, 2^63305513165 is an apocalyptic number.

It is an amenable number.

63305513165 is a deficient number, since it is larger than the sum of its proper divisors (12661102639).

63305513165 is a wasteful number, since it uses less digits than its factorization.

63305513165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12661102638.

The product of its (nonzero) digits is 121500, while the sum is 38.

The spelling of 63305513165 in words is "sixty-three billion, three hundred five million, five hundred thirteen thousand, one hundred sixty-five".