2543528809 has 2 divisors, whose sum is σ = 2543528810. Its totient is φ = 2543528808.

The previous prime is 2543528789. The next prime is 2543528833. The reversal of 2543528809 is 9088253452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1626347584 + 917181225 = 40328^2 + 30285^2 .

It is a cyclic number.

It is not a de Polignac number, because 2543528809 - 2¹¹ = 2543526761 is a prime.

It is not a weakly prime, because it can be changed into another prime (2543528909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1271764404 + 1271764405.

It is an arithmetic number, because the mean of its divisors is an integer number (1271764405).

Almost surely, 2^2543528809 is an apocalyptic number.

It is an amenable number.

2543528809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2543528809 is an equidigital number, since it uses as much as digits as its factorization.

2543528809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 691200, while the sum is 46.

The square root of 2543528809 is about 50433.4096507464. The cubic root of 2543528809 is about 1365.0405528525.

The spelling of 2543528809 in words is "two billion, five hundred forty-three million, five hundred twenty-eight thousand, eight hundred nine".