509145460091 has 2 divisors, whose sum is σ = 509145460092. Its totient is φ = 509145460090.

The previous prime is 509145460079. The next prime is 509145460127. The reversal of 509145460091 is 190064541905.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-509145460091 is a prime.

It is not a weakly prime, because it can be changed into another prime (509145460991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254572730045 + 254572730046.

It is an arithmetic number, because the mean of its divisors is an integer number (254572730046).

Almost surely, 2^509145460091 is an apocalyptic number.

509145460091 is a deficient number, since it is larger than the sum of its proper divisors (1).

509145460091 is an equidigital number, since it uses as much as digits as its factorization.

509145460091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 194400, while the sum is 44.

The spelling of 509145460091 in words is "five hundred nine billion, one hundred forty-five million, four hundred sixty thousand, ninety-one".