918217166345 has 4 divisors (see below), whose sum is σ = 1101860599620. Its totient is φ = 734573733072.

The previous prime is 918217166333. The next prime is 918217166351. The reversal of 918217166345 is 543661712819.

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 549811869049 + 368405297296 = 741493^2 + 606964^2 .

It is a cyclic number.

It is not a de Polignac number, because 918217166345 - 2⁸ = 918217166089 is a prime.

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, 91821716630 + ... + 91821716639.

It is an arithmetic number, because the mean of its divisors is an integer number (275465149905).

Almost surely, 2^918217166345 is an apocalyptic number.

It is an amenable number.

918217166345 is a deficient number, since it is larger than the sum of its proper divisors (183643433275).

918217166345 is a wasteful number, since it uses less digits than its factorization.

918217166345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183643433274.

The product of its digits is 2177280, while the sum is 53.

The spelling of 918217166345 in words is "nine hundred eighteen billion, two hundred seventeen million, one hundred sixty-six thousand, three hundred forty-five".