447138781312 has 32 divisors (see below), whose sum is σ = 894250443420. Its totient is φ = 222699454464.

The previous prime is 447138781289. The next prime is 447138781319. The reversal of 447138781312 is 213187831744.

It can be written as a sum of positive squares in 2 ways, for example, as 399555466816 + 47583314496 = 632104^2 + 218136^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (447138781319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6763353 + ... + 6829144.

Almost surely, 2^447138781312 is an apocalyptic number.

It is an amenable number.

447138781312 is a deficient number, since it is larger than the sum of its proper divisors (447111662108).

447138781312 is a wasteful number, since it uses less digits than its factorization.

447138781312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13592768 (or 13592756 counting only the distinct ones).

The product of its digits is 903168, while the sum is 49.

The spelling of 447138781312 in words is "four hundred forty-seven billion, one hundred thirty-eight million, seven hundred eighty-one thousand, three hundred twelve".