117451618 has 4 divisors (see below), whose sum is σ = 176177430. Its totient is φ = 58725808.

The previous prime is 117451613. The next prime is 117451661. The reversal of 117451618 is 816154711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 816154711 = 271 ⋅3011641.

It can be written as a sum of positive squares in only one way, i.e., 101666889 + 15784729 = 10083^2 + 3973^2 .

It is not an unprimeable number, because it can be changed into a prime (117451613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29362903 + ... + 29362906.

Almost surely, 2^117451618 is an apocalyptic number.

117451618 is a deficient number, since it is larger than the sum of its proper divisors (58725812).

117451618 is an equidigital number, since it uses as much as digits as its factorization.

117451618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58725811.

The product of its digits is 6720, while the sum is 34.

The square root of 117451618 is about 10837.5097693151. The cubic root of 117451618 is about 489.7258191214.

The spelling of 117451618 in words is "one hundred seventeen million, four hundred fifty-one thousand, six hundred eighteen".