43245256657 has 2 divisors, whose sum is σ = 43245256658. Its totient is φ = 43245256656.

The previous prime is 43245256619. The next prime is 43245256661. The reversal of 43245256657 is 75665254234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27787556416 + 15457700241 = 166696^2 + 124329^2 .

It is a cyclic number.

It is not a de Polignac number, because 43245256657 - 2¹¹ = 43245254609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43245256657.

It is not a weakly prime, because it can be changed into another prime (43245251657) 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, 21622628328 + 21622628329.

It is an arithmetic number, because the mean of its divisors is an integer number (21622628329).

Almost surely, 2^43245256657 is an apocalyptic number.

It is an amenable number.

43245256657 is a deficient number, since it is larger than the sum of its proper divisors (1).

43245256657 is an equidigital number, since it uses as much as digits as its factorization.

43245256657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048000, while the sum is 49.

The spelling of 43245256657 in words is "forty-three billion, two hundred forty-five million, two hundred fifty-six thousand, six hundred fifty-seven".