117661218 has 8 divisors (see below), whose sum is σ = 235322448. Its totient is φ = 39220404.

The previous prime is 117661211. The next prime is 117661231. The reversal of 117661218 is 812166711.

It is a happy number.

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

117661218 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (117661211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9805096 + ... + 9805107.

It is an arithmetic number, because the mean of its divisors is an integer number (29415306).

Almost surely, 2^117661218 is an apocalyptic number.

117661218 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

117661218 is a wasteful number, since it uses less digits than its factorization.

117661218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19610208.

The product of its digits is 4032, while the sum is 33.

The square root of 117661218 is about 10847.1755770800. The cubic root of 117661218 is about 490.0169617896.

The spelling of 117661218 in words is "one hundred seventeen million, six hundred sixty-one thousand, two hundred eighteen".