517748205345 has 48 divisors (see below), whose sum is σ = 1020330701568. Its totient is φ = 222762247680.

The previous prime is 517748205301. The next prime is 517748205347. The reversal of 517748205345 is 543502847715.

It is not a de Polignac number, because 517748205345 - 2⁹ = 517748204833 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (517748205347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20705721 + ... + 20730710.

It is an arithmetic number, because the mean of its divisors is an integer number (21256889616).

Almost surely, 2^517748205345 is an apocalyptic number.

It is an amenable number.

517748205345 is a deficient number, since it is larger than the sum of its proper divisors (502582496223).

517748205345 is a wasteful number, since it uses less digits than its factorization.

517748205345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41436470 (or 41436463 counting only the distinct ones).

The product of its (nonzero) digits is 4704000, while the sum is 51.

The spelling of 517748205345 in words is "five hundred seventeen billion, seven hundred forty-eight million, two hundred five thousand, three hundred forty-five".