447886418978 has 4 divisors (see below), whose sum is σ = 671829628470. Its totient is φ = 223943209488.

The previous prime is 447886418977. The next prime is 447886419049. The reversal of 447886418978 is 879814688744.

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., 226763582809 + 221122836169 = 476197^2 + 470237^2 .

It is not an unprimeable number, because it can be changed into a prime (447886418977) 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, 111971604743 + ... + 111971604746.

Almost surely, 2^447886418978 is an apocalyptic number.

447886418978 is a deficient number, since it is larger than the sum of its proper divisors (223943209492).

447886418978 is a wasteful number, since it uses less digits than its factorization.

447886418978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223943209491.

The product of its digits is 693633024, while the sum is 74.

The spelling of 447886418978 in words is "four hundred forty-seven billion, eight hundred eighty-six million, four hundred eighteen thousand, nine hundred seventy-eight".