509418235069 has 4 divisors (see below), whose sum is σ = 510257474944. Its totient is φ = 508578995196.

The previous prime is 509418235043. The next prime is 509418235087. The reversal of 509418235069 is 960532814905.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 960532814905 = 5 ⋅192106562981.

It is a cyclic number.

It is not a de Polignac number, because 509418235069 - 2⁵ = 509418235037 is a prime.

It is a super-2 number, since 2×509418235069² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509418235009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419619027 + ... + 419620240.

It is an arithmetic number, because the mean of its divisors is an integer number (127564368736).

Almost surely, 2^509418235069 is an apocalyptic number.

It is an amenable number.

509418235069 is a deficient number, since it is larger than the sum of its proper divisors (839239875).

509418235069 is an equidigital number, since it uses as much as digits as its factorization.

509418235069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839239874.

The product of its (nonzero) digits is 2332800, while the sum is 52.

The spelling of 509418235069 in words is "five hundred nine billion, four hundred eighteen million, two hundred thirty-five thousand, sixty-nine".