445666993418 has 4 divisors (see below), whose sum is σ = 668500490130. Its totient is φ = 222833496708.

The previous prime is 445666993399. The next prime is 445666993477. The reversal of 445666993418 is 814399666544.

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., 412103654209 + 33563339209 = 641953^2 + 183203^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111416748353 + ... + 111416748356.

Almost surely, 2^445666993418 is an apocalyptic number.

445666993418 is a deficient number, since it is larger than the sum of its proper divisors (222833496712).

445666993418 is a wasteful number, since it uses less digits than its factorization.

445666993418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222833496711.

The product of its digits is 134369280, while the sum is 65.

The spelling of 445666993418 in words is "four hundred forty-five billion, six hundred sixty-six million, nine hundred ninety-three thousand, four hundred eighteen".