318918697906 has 16 divisors (see below), whose sum is σ = 483978773304. Its totient is φ = 157600436224.

The previous prime is 318918697901. The next prime is 318918697943. The reversal of 318918697906 is 609796819813.

It can be written as a sum of positive squares in 4 ways, for example, as 170659045881 + 148259652025 = 413109^2 + 385045^2 .

It is not an unprimeable number, because it can be changed into a prime (318918697901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1919011 + ... + 2078566.

Almost surely, 2^318918697906 is an apocalyptic number.

318918697906 is a deficient number, since it is larger than the sum of its proper divisors (165060075398).

318918697906 is a wasteful number, since it uses less digits than its factorization.

318918697906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3998045.

The product of its (nonzero) digits is 35271936, while the sum is 67.

The spelling of 318918697906 in words is "three hundred eighteen billion, nine hundred eighteen million, six hundred ninety-seven thousand, nine hundred six".