1618716117 has 4 divisors (see below), whose sum is σ = 2158288160. Its totient is φ = 1079144076.

The previous prime is 1618716091. The next prime is 1618716133. The reversal of 1618716117 is 7116178161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1618716117 - 2¹⁸ = 1618453973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1618716157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269786017 + ... + 269786022.

It is an arithmetic number, because the mean of its divisors is an integer number (539572040).

Almost surely, 2^1618716117 is an apocalyptic number.

It is an amenable number.

1618716117 is a deficient number, since it is larger than the sum of its proper divisors (539572043).

1618716117 is an equidigital number, since it uses as much as digits as its factorization.

1618716117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539572042.

The product of its digits is 14112, while the sum is 39.

The square root of 1618716117 is about 40233.2712689386. The cubic root of 1618716117 is about 1174.1499491165.

The spelling of 1618716117 in words is "one billion, six hundred eighteen million, seven hundred sixteen thousand, one hundred seventeen".