506561711571 has 12 divisors (see below), whose sum is σ = 758800259672. Its totient is φ = 337707807552.

The previous prime is 506561711531. The next prime is 506561711581. The reversal of 506561711571 is 175117165605.

506561711571 is a `hidden beast` number, since 5 + 0 + 6 + 5 + 6 + 1 + 71 + 1 + 571 = 666.

It is not a de Polignac number, because 506561711571 - 2²² = 506557517267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (506561711531) 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, 1042307806 + ... + 1042308291.

Almost surely, 2^506561711571 is an apocalyptic number.

506561711571 is a deficient number, since it is larger than the sum of its proper divisors (252238548101).

506561711571 is an equidigital number, since it uses as much as digits as its factorization.

506561711571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2084616112 (or 2084616100 counting only the distinct ones).

The product of its (nonzero) digits is 220500, while the sum is 45.

The spelling of 506561711571 in words is "five hundred six billion, five hundred sixty-one million, seven hundred eleven thousand, five hundred seventy-one".