516442116650561 has 4 divisors (see below), whose sum is σ = 516446497814724. Its totient is φ = 516437735486400.

The previous prime is 516442116650557. The next prime is 516442116650563. The reversal of 516442116650561 is 165056611244615.

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

It can be written as a sum of positive squares in 2 ways, for example, as 359263365611536 + 157178751039025 = 18954244^2 + 12537095^2 .

It is a cyclic number.

It is not a de Polignac number, because 516442116650561 - 2² = 516442116650557 is a prime.

It is a super-2 number, since 2×516442116650561² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (516442116650563) 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, 2190405260 + ... + 2190641021.

It is an arithmetic number, because the mean of its divisors is an integer number (129111624453681).

Almost surely, 2^{516442116650561} is an apocalyptic number.

It is an amenable number.

516442116650561 is a deficient number, since it is larger than the sum of its proper divisors (4381164163).

516442116650561 is a wasteful number, since it uses less digits than its factorization.

516442116650561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4381164162.

The product of its (nonzero) digits is 5184000, while the sum is 53.

The spelling of 516442116650561 in words is "five hundred sixteen trillion, four hundred forty-two billion, one hundred sixteen million, six hundred fifty thousand, five hundred sixty-one".