511861442017 has 4 divisors (see below), whose sum is σ = 512696453140. Its totient is φ = 511026430896.

The previous prime is 511861442011. The next prime is 511861442023. The reversal of 511861442017 is 710244168115.

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

It is an interprime number because it is at equal distance from previous prime (511861442011) and next prime (511861442023).

It can be written as a sum of positive squares in 2 ways, for example, as 144129566736 + 367731875281 = 379644^2 + 606409^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-511861442017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (511861442011) 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, 417504642 + ... + 417505867.

It is an arithmetic number, because the mean of its divisors is an integer number (128174113285).

Almost surely, 2^511861442017 is an apocalyptic number.

It is an amenable number.

511861442017 is a deficient number, since it is larger than the sum of its proper divisors (835011123).

511861442017 is an equidigital number, since it uses as much as digits as its factorization.

511861442017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835011122.

The product of its (nonzero) digits is 53760, while the sum is 40.

The spelling of 511861442017 in words is "five hundred eleven billion, eight hundred sixty-one million, four hundred forty-two thousand, seventeen".