57145538249 has 2 divisors, whose sum is σ = 57145538250. Its totient is φ = 57145538248.

The previous prime is 57145538231. The next prime is 57145538269. The reversal of 57145538249 is 94283554175.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46976227600 + 10169310649 = 216740^2 + 100843^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57145538249 is a prime.

It is a super-2 number, since 2×57145538249² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 57145538249.

It is not a weakly prime, because it can be changed into another prime (57145538209) 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, 28572769124 + 28572769125.

It is an arithmetic number, because the mean of its divisors is an integer number (28572769125).

Almost surely, 2^57145538249 is an apocalyptic number.

It is an amenable number.

57145538249 is a deficient number, since it is larger than the sum of its proper divisors (1).

57145538249 is an equidigital number, since it uses as much as digits as its factorization.

57145538249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048000, while the sum is 53.

The spelling of 57145538249 in words is "fifty-seven billion, one hundred forty-five million, five hundred thirty-eight thousand, two hundred forty-nine".