17818149145 has 4 divisors (see below), whose sum is σ = 21381778980. Its totient is φ = 14254519312.

The previous prime is 17818149143. The next prime is 17818149199. The reversal of 17818149145 is 54194181871.

It is a happy number.

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 2323625616 + 15494523529 = 48204^2 + 124477^2 .

It is a cyclic number.

It is not a de Polignac number, because 17818149145 - 2¹ = 17818149143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (17818149143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1781814910 + ... + 1781814919.

It is an arithmetic number, because the mean of its divisors is an integer number (5345444745).

Almost surely, 2^17818149145 is an apocalyptic number.

It is an amenable number.

17818149145 is a deficient number, since it is larger than the sum of its proper divisors (3563629835).

17818149145 is an equidigital number, since it uses as much as digits as its factorization.

17818149145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3563629834.

The product of its digits is 322560, while the sum is 49.

The spelling of 17818149145 in words is "seventeen billion, eight hundred eighteen million, one hundred forty-nine thousand, one hundred forty-five".