5568640468649 has 2 divisors, whose sum is σ = 5568640468650. Its totient is φ = 5568640468648.

The previous prime is 5568640468631. The next prime is 5568640468673. The reversal of 5568640468649 is 9468640468655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4422895012624 + 1145745456025 = 2103068^2 + 1070395^2 .

It is a cyclic number.

It is not a de Polignac number, because 5568640468649 - 2¹² = 5568640464553 is a prime.

It is not a weakly prime, because it can be changed into another prime (5568640468619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2784320234324 + 2784320234325.

It is an arithmetic number, because the mean of its divisors is an integer number (2784320234325).

Almost surely, 2^{5568640468649} is an apocalyptic number.

It is an amenable number.

5568640468649 is a deficient number, since it is larger than the sum of its proper divisors (1).

5568640468649 is an equidigital number, since it uses as much as digits as its factorization.

5568640468649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1194393600, while the sum is 71.

The spelling of 5568640468649 in words is "five trillion, five hundred sixty-eight billion, six hundred forty million, four hundred sixty-eight thousand, six hundred forty-nine".