516897554647 has 2 divisors, whose sum is σ = 516897554648. Its totient is φ = 516897554646.

The previous prime is 516897554639. The next prime is 516897554699. The reversal of 516897554647 is 746455798615.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 516897554647 - 2³ = 516897554639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (516897554947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258448777323 + 258448777324.

It is an arithmetic number, because the mean of its divisors is an integer number (258448777324).

Almost surely, 2^516897554647 is an apocalyptic number.

516897554647 is a deficient number, since it is larger than the sum of its proper divisors (1).

516897554647 is an equidigital number, since it uses as much as digits as its factorization.

516897554647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016000, while the sum is 67.

The spelling of 516897554647 in words is "five hundred sixteen billion, eight hundred ninety-seven million, five hundred fifty-four thousand, six hundred forty-seven".