513323630661 has 64 divisors (see below), whose sum is σ = 712465956864. Its totient is φ = 328595097600.

The previous prime is 513323630657. The next prime is 513323630689. The reversal of 513323630661 is 166036323315.

It is not a de Polignac number, because 513323630661 - 2² = 513323630657 is a prime.

It is a super-2 number, since 2×513323630661² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513323630641) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 813507816 + ... + 813508446.

It is an arithmetic number, because the mean of its divisors is an integer number (11132280576).

Almost surely, 2^513323630661 is an apocalyptic number.

It is an amenable number.

513323630661 is a deficient number, since it is larger than the sum of its proper divisors (199142326203).

513323630661 is a wasteful number, since it uses less digits than its factorization.

513323630661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1354.

The product of its (nonzero) digits is 174960, while the sum is 39.

Adding to 513323630661 its reverse (166036323315), we get a palindrome (679359953976).

The spelling of 513323630661 in words is "five hundred thirteen billion, three hundred twenty-three million, six hundred thirty thousand, six hundred sixty-one".