447817528138 has 4 divisors (see below), whose sum is σ = 671726292210. Its totient is φ = 223908764068.

The previous prime is 447817528127. The next prime is 447817528139. The reversal of 447817528138 is 831825718744.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 447677413569 + 140114569 = 669087^2 + 11837^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (447817528139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111954382033 + ... + 111954382036.

Almost surely, 2^447817528138 is an apocalyptic number.

447817528138 is a deficient number, since it is larger than the sum of its proper divisors (223908764072).

447817528138 is a wasteful number, since it uses less digits than its factorization.

447817528138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223908764071.

The product of its digits is 12042240, while the sum is 58.

The spelling of 447817528138 in words is "four hundred forty-seven billion, eight hundred seventeen million, five hundred twenty-eight thousand, one hundred thirty-eight".