1117718845 has 4 divisors (see below), whose sum is σ = 1341262620. Its totient is φ = 894175072.

The previous prime is 1117718843. The next prime is 1117718863. The reversal of 1117718845 is 5488177111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 227949604 + 889769241 = 15098^2 + 29829^2 .

It is a cyclic number.

It is not a de Polignac number, because 1117718845 - 2¹ = 1117718843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1117718843) 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, 111771880 + ... + 111771889.

It is an arithmetic number, because the mean of its divisors is an integer number (335315655).

Almost surely, 2^1117718845 is an apocalyptic number.

It is an amenable number.

1117718845 is a deficient number, since it is larger than the sum of its proper divisors (223543775).

1117718845 is an equidigital number, since it uses as much as digits as its factorization.

1117718845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223543774.

The product of its digits is 62720, while the sum is 43.

The square root of 1117718845 is about 33432.3024184695. The cubic root of 1117718845 is about 1037.7932885449.

The spelling of 1117718845 in words is "one billion, one hundred seventeen million, seven hundred eighteen thousand, eight hundred forty-five".