511561025243 has 2 divisors, whose sum is σ = 511561025244. Its totient is φ = 511561025242.

The previous prime is 511561025197. The next prime is 511561025249. The reversal of 511561025243 is 342520165115.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 511561025243 - 2²⁰ = 511559976667 is a prime.

It is not a weakly prime, because it can be changed into another prime (511561025249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255780512621 + 255780512622.

It is an arithmetic number, because the mean of its divisors is an integer number (255780512622).

Almost surely, 2^511561025243 is an apocalyptic number.

511561025243 is a deficient number, since it is larger than the sum of its proper divisors (1).

511561025243 is an equidigital number, since it uses as much as digits as its factorization.

511561025243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 511561025243 in words is "five hundred eleven billion, five hundred sixty-one million, twenty-five thousand, two hundred forty-three".