517253741515661 has 8 divisors (see below), whose sum is σ = 521258878524384. Its totient is φ = 513249462615760.

The previous prime is 517253741515633. The next prime is 517253741515703. The reversal of 517253741515661 is 166515147352715.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 517253741515661 - 2¹⁴ = 517253741499277 is a prime.

It is a super-2 number, since 2×517253741515661² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 517253741515661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (517253741515261) 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 7 ways as a sum of consecutive naturals, for example, 213316946 + ... + 215728131.

It is an arithmetic number, because the mean of its divisors is an integer number (65157359815548).

Almost surely, 2^{517253741515661} is an apocalyptic number.

It is an amenable number.

517253741515661 is a deficient number, since it is larger than the sum of its proper divisors (4005137008723).

517253741515661 is a wasteful number, since it uses less digits than its factorization.

517253741515661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429054411.

The product of its digits is 26460000, while the sum is 59.

The spelling of 517253741515661 in words is "five hundred seventeen trillion, two hundred fifty-three billion, seven hundred forty-one million, five hundred fifteen thousand, six hundred sixty-one".