513205131660 has 48 divisors (see below), whose sum is σ = 1547510860896. Its totient is φ = 126327416832.

The previous prime is 513205131643. The next prime is 513205131671. The reversal of 513205131660 is 66131502315.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 328976869 + ... + 328978428.

It is an arithmetic number, because the mean of its divisors is an integer number (32239809602).

Almost surely, 2^513205131660 is an apocalyptic number.

It is an amenable number.

513205131660 is an abundant number, since it is smaller than the sum of its proper divisors (1034305729236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

513205131660 is a wasteful number, since it uses less digits than its factorization.

513205131660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657955322 (or 657955320 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 33.

Adding to 513205131660 its reverse (66131502315), we get a palindrome (579336633975).

The spelling of 513205131660 in words is "five hundred thirteen billion, two hundred five million, one hundred thirty-one thousand, six hundred sixty".