516523400663 has 4 divisors (see below), whose sum is σ = 534334552440. Its totient is φ = 498712248888.

The previous prime is 516523400621. The next prime is 516523400669. The reversal of 516523400663 is 366004325615.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 366004325615 = 5 ⋅73200865123.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-516523400663 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 516523400663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516523400669) 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, 8905575845 + ... + 8905575902.

It is an arithmetic number, because the mean of its divisors is an integer number (133583638110).

Almost surely, 2^516523400663 is an apocalyptic number.

516523400663 is a deficient number, since it is larger than the sum of its proper divisors (17811151777).

516523400663 is a wasteful number, since it uses less digits than its factorization.

516523400663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17811151776.

The product of its (nonzero) digits is 388800, while the sum is 41.

The spelling of 516523400663 in words is "five hundred sixteen billion, five hundred twenty-three million, four hundred thousand, six hundred sixty-three".