516216816893 has 8 divisors (see below), whose sum is σ = 521838583896. Its totient is φ = 510605064000.

The previous prime is 516216816883. The next prime is 516216816901. The reversal of 516216816893 is 398618612615.

It can be written as a sum of positive squares in 4 ways, for example, as 410385015769 + 105831801124 = 640613^2 + 325318^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 516216816893 - 2⁴ = 516216816877 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 (516216816823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2399846 + ... + 2606087.

It is an arithmetic number, because the mean of its divisors is an integer number (65229822987).

Almost surely, 2^516216816893 is an apocalyptic number.

It is an amenable number.

516216816893 is a deficient number, since it is larger than the sum of its proper divisors (5621767003).

516216816893 is a wasteful number, since it uses less digits than its factorization.

516216816893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5007055.

The product of its digits is 3732480, while the sum is 56.

The spelling of 516216816893 in words is "five hundred sixteen billion, two hundred sixteen million, eight hundred sixteen thousand, eight hundred ninety-three".