5578061809 has 2 divisors, whose sum is σ = 5578061810. Its totient is φ = 5578061808.

The previous prime is 5578061789. The next prime is 5578061843. The reversal of 5578061809 is 9081608755.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3788771809 + 1789290000 = 61553^2 + 42300^2 .

It is a cyclic number.

It is not a de Polignac number, because 5578061809 - 2⁷ = 5578061681 is a prime.

It is a super-2 number, since 2×5578061809² = 62229547090048704962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5578061509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2789030904 + 2789030905.

It is an arithmetic number, because the mean of its divisors is an integer number (2789030905).

Almost surely, 2^5578061809 is an apocalyptic number.

It is an amenable number.

5578061809 is a deficient number, since it is larger than the sum of its proper divisors (1).

5578061809 is an equidigital number, since it uses as much as digits as its factorization.

5578061809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 604800, while the sum is 49.

The square root of 5578061809 is about 74686.4231905639. The cubic root of 5578061809 is about 1773.4860392419.

The spelling of 5578061809 in words is "five billion, five hundred seventy-eight million, sixty-one thousand, eight hundred nine".