447748144381 has 2 divisors, whose sum is σ = 447748144382. Its totient is φ = 447748144380.

The previous prime is 447748144357. The next prime is 447748144391. The reversal of 447748144381 is 183441847744.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 374961500281 + 72786644100 = 612341^2 + 269790^2 .

It is a cyclic number.

It is not a de Polignac number, because 447748144381 - 2¹³ = 447748136189 is a prime.

It is a super-2 number, since 2×447748144381² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (447748144391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223874072190 + 223874072191.

It is an arithmetic number, because the mean of its divisors is an integer number (223874072191).

Almost surely, 2^447748144381 is an apocalyptic number.

It is an amenable number.

447748144381 is a deficient number, since it is larger than the sum of its proper divisors (1).

447748144381 is an equidigital number, since it uses as much as digits as its factorization.

447748144381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9633792, while the sum is 55.

The spelling of 447748144381 in words is "four hundred forty-seven billion, seven hundred forty-eight million, one hundred forty-four thousand, three hundred eighty-one".