513216423663 has 4 divisors (see below), whose sum is σ = 684288564888. Its totient is φ = 342144282440.

The previous prime is 513216423641. The next prime is 513216423701. The reversal of 513216423663 is 366324612315.

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 513216423663 - 2²¹ = 513214326511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513216423563) 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, 85536070608 + ... + 85536070613.

It is an arithmetic number, because the mean of its divisors is an integer number (171072141222).

Almost surely, 2^513216423663 is an apocalyptic number.

513216423663 is a deficient number, since it is larger than the sum of its proper divisors (171072141225).

513216423663 is a wasteful number, since it uses less digits than its factorization.

513216423663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171072141224.

The product of its digits is 466560, while the sum is 42.

The spelling of 513216423663 in words is "five hundred thirteen billion, two hundred sixteen million, four hundred twenty-three thousand, six hundred sixty-three".