517561733107172 has 24 divisors (see below), whose sum is σ = 975488769411576. Its totient is φ = 238854083263488.

The previous prime is 517561733107171. The next prime is 517561733107183. The reversal of 517561733107172 is 271701337165715.

It can be written as a sum of positive squares in 4 ways, for example, as 100456840569856 + 417104892537316 = 10022816^2 + 20423146^2 .

It is a super-2 number, since 2×517561733107172² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (517561733107171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 427781483 + ... + 428989650.

It is an arithmetic number, because the mean of its divisors is an integer number (40645365392149).

Almost surely, 2^{517561733107172} is an apocalyptic number.

517561733107172 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

517561733107172 is a deficient number, since it is larger than the sum of its proper divisors (457927036304404).

517561733107172 is a wasteful number, since it uses less digits than its factorization.

517561733107172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856782767 (or 856782765 counting only the distinct ones).

The product of its (nonzero) digits is 6482700, while the sum is 56.

The spelling of 517561733107172 in words is "five hundred seventeen trillion, five hundred sixty-one billion, seven hundred thirty-three million, one hundred seven thousand, one hundred seventy-two".