516325122818 has 6 divisors (see below), whose sum is σ = 774489208521. Its totient is φ = 258162053312.

The previous prime is 516325122811. The next prime is 516325122821. The reversal of 516325122818 is 818221523615.

It can be written as a sum of positive squares in 2 ways, for example, as 446767917649 + 69557205169 = 668407^2 + 263737^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=508097.

It is a super-2 number, since 2×516325122818² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (516325122811) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 762146 + ... + 1270242.

Almost surely, 2^516325122818 is an apocalyptic number.

516325122818 is a deficient number, since it is larger than the sum of its proper divisors (258164085703).

516325122818 is an frugal number, since it uses more digits than its factorization.

516325122818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016196 (or 508099 counting only the distinct ones).

The product of its digits is 230400, while the sum is 44.

The spelling of 516325122818 in words is "five hundred sixteen billion, three hundred twenty-five million, one hundred twenty-two thousand, eight hundred eighteen".