447815685409 has 2 divisors, whose sum is σ = 447815685410. Its totient is φ = 447815685408.

The previous prime is 447815685337. The next prime is 447815685437. The reversal of 447815685409 is 904586518744.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 417190685409 + 30625000000 = 645903^2 + 175000^2 .

It is a cyclic number.

It is not a de Polignac number, because 447815685409 - 2⁷ = 447815685281 is a prime.

It is not a weakly prime, because it can be changed into another prime (447815685479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223907842704 + 223907842705.

It is an arithmetic number, because the mean of its divisors is an integer number (223907842705).

Almost surely, 2^447815685409 is an apocalyptic number.

It is an amenable number.

447815685409 is a deficient number, since it is larger than the sum of its proper divisors (1).

447815685409 is an equidigital number, since it uses as much as digits as its factorization.

447815685409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38707200, while the sum is 61.

The spelling of 447815685409 in words is "four hundred forty-seven billion, eight hundred fifteen million, six hundred eighty-five thousand, four hundred nine".