538209359917 has 4 divisors (see below), whose sum is σ = 538211792160. Its totient is φ = 538206927676.

The previous prime is 538209359903. The next prime is 538209359953. The reversal of 538209359917 is 719953902835.

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: 719953902835 = 5 ⋅143990780567.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-538209359917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538209359117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 846817 + ... + 1339222.

It is an arithmetic number, because the mean of its divisors is an integer number (134552948040).

Almost surely, 2^538209359917 is an apocalyptic number.

It is an amenable number.

538209359917 is a deficient number, since it is larger than the sum of its proper divisors (2432243).

538209359917 is a wasteful number, since it uses less digits than its factorization.

538209359917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2432242.

The product of its (nonzero) digits is 18370800, while the sum is 61.

The spelling of 538209359917 in words is "five hundred thirty-eight billion, two hundred nine million, three hundred fifty-nine thousand, nine hundred seventeen".