447744691381905 has 48 divisors (see below), whose sum is σ = 821808740445264. Its totient is φ = 224732350402560.

The previous prime is 447744691381879. The next prime is 447744691381909. The reversal of 447744691381905 is 509183196447744.

447744691381905 is a `hidden beast` number, since 4 + 4 + 7 + 7 + 446 + 9 + 13 + 81 + 90 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 2819538005904 + 444925153376001 = 1679148^2 + 21093249^2 .

It is not a de Polignac number, because 447744691381905 - 2¹⁷ = 447744691250833 is a prime.

It is a super-2 number, since 2×447744691381905² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (447744691381909) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13741084 + ... + 32928813.

It is an arithmetic number, because the mean of its divisors is an integer number (17121015425943).

Almost surely, 2^{447744691381905} is an apocalyptic number.

447744691381905 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

447744691381905 is a deficient number, since it is larger than the sum of its proper divisors (374064049063359).

447744691381905 is a wasteful number, since it uses less digits than its factorization.

447744691381905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46682466 (or 46682463 counting only the distinct ones).

The product of its (nonzero) digits is 731566080, while the sum is 72.

The spelling of 447744691381905 in words is "four hundred forty-seven trillion, seven hundred forty-four billion, six hundred ninety-one million, three hundred eighty-one thousand, nine hundred five".