318783729442 has 4 divisors (see below), whose sum is σ = 478175594166. Its totient is φ = 159391864720.

The previous prime is 318783729421. The next prime is 318783729487. The reversal of 318783729442 is 244927387813.

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., 245677844281 + 73105885161 = 495659^2 + 270381^2 .

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 an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79695932359 + ... + 79695932362.

Almost surely, 2^318783729442 is an apocalyptic number.

318783729442 is a deficient number, since it is larger than the sum of its proper divisors (159391864724).

318783729442 is a wasteful number, since it uses less digits than its factorization.

318783729442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159391864723.

The product of its digits is 16257024, while the sum is 58.

The spelling of 318783729442 in words is "three hundred eighteen billion, seven hundred eighty-three million, seven hundred twenty-nine thousand, four hundred forty-two".