2575643849 has 2 divisors, whose sum is σ = 2575643850. Its totient is φ = 2575643848.

The previous prime is 2575643831. The next prime is 2575643911. The reversal of 2575643849 is 9483465752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1618855225 + 956788624 = 40235^2 + 30932^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2575643849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2575643849.

It is not a weakly prime, because it can be changed into another prime (2575643449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1287821924 + 1287821925.

It is an arithmetic number, because the mean of its divisors is an integer number (1287821925).

Almost surely, 2^2575643849 is an apocalyptic number.

It is an amenable number.

2575643849 is a deficient number, since it is larger than the sum of its proper divisors (1).

2575643849 is an equidigital number, since it uses as much as digits as its factorization.

2575643849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7257600, while the sum is 53.

The square root of 2575643849 is about 50750.8014616518. The cubic root of 2575643849 is about 1370.7616219083.

The spelling of 2575643849 in words is "two billion, five hundred seventy-five million, six hundred forty-three thousand, eight hundred forty-nine".