538541173458817 has 4 divisors (see below), whose sum is σ = 570220066015236. Its totient is φ = 506862280902400.

The previous prime is 538541173458811. The next prime is 538541173458829. The reversal of 538541173458817 is 718854371145835.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 329091853710321 + 209449319748496 = 18140889^2 + 14472364^2 .

It is a cyclic number.

It is not a de Polignac number, because 538541173458817 - 2³ = 538541173458809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (538541173458811) 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, 15839446278184 + ... + 15839446278217.

It is an arithmetic number, because the mean of its divisors is an integer number (142555016503809).

Almost surely, 2^{538541173458817} is an apocalyptic number.

It is an amenable number.

538541173458817 is a deficient number, since it is larger than the sum of its proper divisors (31678892556419).

538541173458817 is a wasteful number, since it uses less digits than its factorization.

538541173458817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31678892556418.

The product of its digits is 451584000, while the sum is 70.

The spelling of 538541173458817 in words is "five hundred thirty-eight trillion, five hundred forty-one billion, one hundred seventy-three million, four hundred fifty-eight thousand, eight hundred seventeen".