563765317561 has 8 divisors (see below), whose sum is σ = 593453102400. Its totient is φ = 534079125360.

The previous prime is 563765317543. The next prime is 563765317567. The reversal of 563765317561 is 165713567365.

It is a happy number.

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 563765317561 - 2³³ = 555175382969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (563765317567) 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, 366075 + ... + 1123183.

It is an arithmetic number, because the mean of its divisors is an integer number (74181637800).

Almost surely, 2^563765317561 is an apocalyptic number.

It is an amenable number.

563765317561 is a deficient number, since it is larger than the sum of its proper divisors (29687784839).

563765317561 is a wasteful number, since it uses less digits than its factorization.

563765317561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796319.

The product of its digits is 11907000, while the sum is 55.

The spelling of 563765317561 in words is "five hundred sixty-three billion, seven hundred sixty-five million, three hundred seventeen thousand, five hundred sixty-one".