517447205138 has 16 divisors (see below), whose sum is σ = 797727050880. Its totient is φ = 251635949136.

The previous prime is 517447205063. The next prime is 517447205159. The reversal of 517447205138 is 831502744715.

It is a super-2 number, since 2×517447205138² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 517447205092 and 517447205101.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24429581 + ... + 24450752.

It is an arithmetic number, because the mean of its divisors is an integer number (49857940680).

Almost surely, 2^517447205138 is an apocalyptic number.

517447205138 is a deficient number, since it is larger than the sum of its proper divisors (280279845742).

517447205138 is a wasteful number, since it uses less digits than its factorization.

517447205138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48880481.

The product of its (nonzero) digits is 940800, while the sum is 47.

The spelling of 517447205138 in words is "five hundred seventeen billion, four hundred forty-seven million, two hundred five thousand, one hundred thirty-eight".