511412306261 has 2 divisors, whose sum is σ = 511412306262. Its totient is φ = 511412306260.

The previous prime is 511412306257. The next prime is 511412306267. The reversal of 511412306261 is 162603214115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 380824752100 + 130587554161 = 617110^2 + 361369^2 .

It is a cyclic number.

It is not a de Polignac number, because 511412306261 - 2² = 511412306257 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (511412306267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255706153130 + 255706153131.

It is an arithmetic number, because the mean of its divisors is an integer number (255706153131).

Almost surely, 2^511412306261 is an apocalyptic number.

It is an amenable number.

511412306261 is a deficient number, since it is larger than the sum of its proper divisors (1).

511412306261 is an equidigital number, since it uses as much as digits as its factorization.

511412306261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 511412306261 in words is "five hundred eleven billion, four hundred twelve million, three hundred six thousand, two hundred sixty-one".