447125865521 has 2 divisors, whose sum is σ = 447125865522. Its totient is φ = 447125865520.

The previous prime is 447125865509. The next prime is 447125865539. The reversal of 447125865521 is 125568521744.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 229656600625 + 217469264896 = 479225^2 + 466336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-447125865521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 447125865521.

It is not a weakly prime, because it can be changed into another prime (447125865581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223562932760 + 223562932761.

It is an arithmetic number, because the mean of its divisors is an integer number (223562932761).

Almost surely, 2^447125865521 is an apocalyptic number.

It is an amenable number.

447125865521 is a deficient number, since it is larger than the sum of its proper divisors (1).

447125865521 is an equidigital number, since it uses as much as digits as its factorization.

447125865521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688000, while the sum is 50.

The spelling of 447125865521 in words is "four hundred forty-seven billion, one hundred twenty-five million, eight hundred sixty-five thousand, five hundred twenty-one".