447381630021655 has 16 divisors (see below), whose sum is σ = 615550490311680. Its totient is φ = 305776704588192.

The previous prime is 447381630021647. The next prime is 447381630021661. The reversal of 447381630021655 is 556120036183744.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 447381630021655 - 2³ = 447381630021647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 447381630021596 and 447381630021605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20818120015 + ... + 20818141504.

It is an arithmetic number, because the mean of its divisors is an integer number (38471905644480).

Almost surely, 2^{447381630021655} is an apocalyptic number.

447381630021655 is a deficient number, since it is larger than the sum of its proper divisors (168168860290025).

447381630021655 is a wasteful number, since it uses less digits than its factorization.

447381630021655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41636261838.

The product of its (nonzero) digits is 14515200, while the sum is 55.

The spelling of 447381630021655 in words is "four hundred forty-seven trillion, three hundred eighty-one billion, six hundred thirty million, twenty-one thousand, six hundred fifty-five".