517021016126045 has 4 divisors (see below), whose sum is σ = 620425219351260. Its totient is φ = 413616812900832.

The previous prime is 517021016126039. The next prime is 517021016126113. The reversal of 517021016126045 is 540621610120715.

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 242904880184836 + 274116135941209 = 15585406^2 + 16556453^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-517021016126045 is a prime.

It is a super-2 number, since 2×517021016126045² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 517021016125993 and 517021016126011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51702101612600 + ... + 51702101612609.

It is an arithmetic number, because the mean of its divisors is an integer number (155106304837815).

Almost surely, 2^{517021016126045} is an apocalyptic number.

It is an amenable number.

517021016126045 is a deficient number, since it is larger than the sum of its proper divisors (103404203225215).

517021016126045 is a wasteful number, since it uses less digits than its factorization.

517021016126045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103404203225214.

The product of its (nonzero) digits is 100800, while the sum is 41.

The spelling of 517021016126045 in words is "five hundred seventeen trillion, twenty-one billion, sixteen million, one hundred twenty-six thousand, forty-five".