445429172809 has 2 divisors, whose sum is σ = 445429172810. Its totient is φ = 445429172808.

The previous prime is 445429172743. The next prime is 445429172869. The reversal of 445429172809 is 908271924544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 341453235600 + 103975937209 = 584340^2 + 322453^2 .

It is a cyclic number.

It is not a de Polignac number, because 445429172809 - 2⁷ = 445429172681 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 445429172809.

It is not a weakly prime, because it can be changed into another prime (445429172869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222714586404 + 222714586405.

It is an arithmetic number, because the mean of its divisors is an integer number (222714586405).

Almost surely, 2^445429172809 is an apocalyptic number.

It is an amenable number.

445429172809 is a deficient number, since it is larger than the sum of its proper divisors (1).

445429172809 is an equidigital number, since it uses as much as digits as its factorization.

445429172809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 445429172809 in words is "four hundred forty-five billion, four hundred twenty-nine million, one hundred seventy-two thousand, eight hundred nine".