517198979413 has 4 divisors (see below), whose sum is σ = 520919835520. Its totient is φ = 513478123308.

The previous prime is 517198979393. The next prime is 517198979419. The reversal of 517198979413 is 314979891715.

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.

It is a cyclic number.

It is not a de Polignac number, because 517198979413 - 2²¹ = 517196882261 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 (517198979419) 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, 1860427845 + ... + 1860428122.

It is an arithmetic number, because the mean of its divisors is an integer number (130229958880).

Almost surely, 2^517198979413 is an apocalyptic number.

It is an amenable number.

517198979413 is a deficient number, since it is larger than the sum of its proper divisors (3720856107).

517198979413 is a wasteful number, since it uses less digits than its factorization.

517198979413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3720856106.

The product of its digits is 17146080, while the sum is 64.

The spelling of 517198979413 in words is "five hundred seventeen billion, one hundred ninety-eight million, nine hundred seventy-nine thousand, four hundred thirteen".