447247463572661 has 2 divisors, whose sum is σ = 447247463572662. Its totient is φ = 447247463572660.

The previous prime is 447247463572543. The next prime is 447247463572709. The reversal of 447247463572661 is 166275364742744.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 444031291202500 + 3216172370161 = 21072050^2 + 1793369^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-447247463572661 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 447247463572591 and 447247463572600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (447247463572061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223623731786330 + 223623731786331.

It is an arithmetic number, because the mean of its divisors is an integer number (223623731786331).

Almost surely, 2^{447247463572661} is an apocalyptic number.

It is an amenable number.

447247463572661 is a deficient number, since it is larger than the sum of its proper divisors (1).

447247463572661 is an equidigital number, since it uses as much as digits as its factorization.

447247463572661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1137991680, while the sum is 68.

The spelling of 447247463572661 in words is "four hundred forty-seven trillion, two hundred forty-seven billion, four hundred sixty-three million, five hundred seventy-two thousand, six hundred sixty-one".