506350805561 has 4 divisors (see below), whose sum is σ = 508750572624. Its totient is φ = 503951038500.

The previous prime is 506350805531. The next prime is 506350805573. The reversal of 506350805561 is 165508053605.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 506350805561 - 2¹⁰ = 506350804537 is a prime.

It is a super-2 number, since 2×506350805561² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (506350805531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1199883215 + ... + 1199883636.

It is an arithmetic number, because the mean of its divisors is an integer number (127187643156).

Almost surely, 2^506350805561 is an apocalyptic number.

It is an amenable number.

506350805561 is a deficient number, since it is larger than the sum of its proper divisors (2399767063).

506350805561 is a wasteful number, since it uses less digits than its factorization.

506350805561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2399767062.

The product of its (nonzero) digits is 540000, while the sum is 44.

The spelling of 506350805561 in words is "five hundred six billion, three hundred fifty million, eight hundred five thousand, five hundred sixty-one".