5645137409 has 2 divisors, whose sum is σ = 5645137410. Its totient is φ = 5645137408.

The previous prime is 5645137387. The next prime is 5645137517. The reversal of 5645137409 is 9047315465.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4654650625 + 990486784 = 68225^2 + 31472^2 .

It is a cyclic number.

It is not a de Polignac number, because 5645137409 - 2²⁴ = 5628360193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5645137409.

It is not a weakly prime, because it can be changed into another prime (5645137009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2822568704 + 2822568705.

It is an arithmetic number, because the mean of its divisors is an integer number (2822568705).

Almost surely, 2^5645137409 is an apocalyptic number.

It is an amenable number.

5645137409 is a deficient number, since it is larger than the sum of its proper divisors (1).

5645137409 is an equidigital number, since it uses as much as digits as its factorization.

5645137409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 453600, while the sum is 44.

The square root of 5645137409 is about 75134.1294552615. The cubic root of 5645137409 is about 1780.5663947871.

The spelling of 5645137409 in words is "five billion, six hundred forty-five million, one hundred thirty-seven thousand, four hundred nine".