513620353663 has 4 divisors (see below), whose sum is σ = 513812651488. Its totient is φ = 513428055840.

The previous prime is 513620353661. The next prime is 513620353669. The reversal of 513620353663 is 366353026315.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 513620353663 - 2¹ = 513620353661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513620353661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96144906 + ... + 96150247.

It is an arithmetic number, because the mean of its divisors is an integer number (128453162872).

Almost surely, 2^513620353663 is an apocalyptic number.

513620353663 is a deficient number, since it is larger than the sum of its proper divisors (192297825).

513620353663 is a wasteful number, since it uses less digits than its factorization.

513620353663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192297824.

The product of its (nonzero) digits is 874800, while the sum is 43.

Adding to 513620353663 its reverse (366353026315), we get a palindrome (879973379978).

The spelling of 513620353663 in words is "five hundred thirteen billion, six hundred twenty million, three hundred fifty-three thousand, six hundred sixty-three".