117638213018 has 8 divisors (see below), whose sum is σ = 176542612020. Its totient is φ = 58790675680.

The previous prime is 117638213009. The next prime is 117638213047. The reversal of 117638213018 is 810312836711.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 92834167969 + 24804045049 = 304687^2 + 157493^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14210243 + ... + 14218518.

Almost surely, 2^117638213018 is an apocalyptic number.

117638213018 is a deficient number, since it is larger than the sum of its proper divisors (58904399002).

117638213018 is a wasteful number, since it uses less digits than its factorization.

117638213018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28430832.

The product of its (nonzero) digits is 48384, while the sum is 41.

The spelling of 117638213018 in words is "one hundred seventeen billion, six hundred thirty-eight million, two hundred thirteen thousand, eighteen".