645063565363 has 8 divisors (see below), whose sum is σ = 737571834720. Its totient is φ = 552644378880.

The previous prime is 645063565357. The next prime is 645063565369. The reversal of 645063565363 is 363565360546.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (645063565357) and next prime (645063565369).

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 645063565363 - 2²⁹ = 644526694451 is a prime.

It is a super-2 number, since 2×645063565363² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 645063565363.

It is not an unprimeable number, because it can be changed into a prime (645063565369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22255198 + ... + 22284163.

It is an arithmetic number, because the mean of its divisors is an integer number (92196479340).

Almost surely, 2^645063565363 is an apocalyptic number.

645063565363 is a deficient number, since it is larger than the sum of its proper divisors (92508269357).

645063565363 is a wasteful number, since it uses less digits than its factorization.

645063565363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44541437.

The product of its (nonzero) digits is 17496000, while the sum is 52.

The spelling of 645063565363 in words is "six hundred forty-five billion, sixty-three million, five hundred sixty-five thousand, three hundred sixty-three".