513173666444 has 6 divisors (see below), whose sum is σ = 898053916284. Its totient is φ = 256586833220.

The previous prime is 513173666413. The next prime is 513173666519. The reversal of 513173666444 is 444666371315.

It is a junction number, because it is equal to n+sod(n) for n = 513173666392 and 513173666401.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64146708302 + ... + 64146708309.

It is an arithmetic number, because the mean of its divisors is an integer number (149675652714).

Almost surely, 2^513173666444 is an apocalyptic number.

It is an amenable number.

513173666444 is a deficient number, since it is larger than the sum of its proper divisors (384880249840).

513173666444 is a wasteful number, since it uses less digits than its factorization.

513173666444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128293416615 (or 128293416613 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 50.

The spelling of 513173666444 in words is "five hundred thirteen billion, one hundred seventy-three million, six hundred sixty-six thousand, four hundred forty-four".