2057645549 has 2 divisors, whose sum is σ = 2057645550. Its totient is φ = 2057645548.

The previous prime is 2057645539. The next prime is 2057645561. The reversal of 2057645549 is 9455467502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1172583049 + 885062500 = 34243^2 + 29750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2057645549 is a prime.

It is a super-2 number, since 2×2057645549² = 8467810410639022802, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2057645519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1028822774 + 1028822775.

It is an arithmetic number, because the mean of its divisors is an integer number (1028822775).

Almost surely, 2^2057645549 is an apocalyptic number.

It is an amenable number.

2057645549 is a deficient number, since it is larger than the sum of its proper divisors (1).

2057645549 is an equidigital number, since it uses as much as digits as its factorization.

2057645549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512000, while the sum is 47.

The square root of 2057645549 is about 45361.2780794369. The cubic root of 2057645549 is about 1271.9113858225.

The spelling of 2057645549 in words is "two billion, fifty-seven million, six hundred forty-five thousand, five hundred forty-nine".