511535403406091 has 2 divisors, whose sum is σ = 511535403406092. Its totient is φ = 511535403406090.

The previous prime is 511535403406039. The next prime is 511535403406109. The reversal of 511535403406091 is 190604304535115.

Together with next prime (511535403406109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-511535403406091 is a prime.

It is not a weakly prime, because it can be changed into another prime (511535403406891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255767701703045 + 255767701703046.

It is an arithmetic number, because the mean of its divisors is an integer number (255767701703046).

Almost surely, 2^{511535403406091} is an apocalyptic number.

511535403406091 is a deficient number, since it is larger than the sum of its proper divisors (1).

511535403406091 is an equidigital number, since it uses as much as digits as its factorization.

511535403406091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972000, while the sum is 47.

The spelling of 511535403406091 in words is "five hundred eleven trillion, five hundred thirty-five billion, four hundred three million, four hundred six thousand, ninety-one".