4078557809 has 2 divisors, whose sum is σ = 4078557810. Its totient is φ = 4078557808.

The previous prime is 4078557793. The next prime is 4078557829. The reversal of 4078557809 is 9087558704.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3547393600 + 531164209 = 59560^2 + 23047^2 .

It is a cyclic number.

It is not a de Polignac number, because 4078557809 - 2⁴ = 4078557793 is a prime.

It is not a weakly prime, because it can be changed into another prime (4078557829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2039278904 + 2039278905.

It is an arithmetic number, because the mean of its divisors is an integer number (2039278905).

Almost surely, 2^4078557809 is an apocalyptic number.

It is an amenable number.

4078557809 is a deficient number, since it is larger than the sum of its proper divisors (1).

4078557809 is an equidigital number, since it uses as much as digits as its factorization.

4078557809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2822400, while the sum is 53.

The square root of 4078557809 is about 63863.5875049312. The cubic root of 4078557809 is about 1597.7256499946.

The spelling of 4078557809 in words is "four billion, seventy-eight million, five hundred fifty-seven thousand, eight hundred nine".