918511323115819 has 4 divisors (see below), whose sum is σ = 930138048724960. Its totient is φ = 906884597506680.

The previous prime is 918511323115811. The next prime is 918511323115861.

It is a happy number.

918511323115819 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 918511323115819 - 2³ = 918511323115811 is a prime.

It is a super-2 number, since 2×918511323115819² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (918511323115811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5813362804452 + ... + 5813362804609.

It is an arithmetic number, because the mean of its divisors is an integer number (232534512181240).

Almost surely, 2^{918511323115819} is an apocalyptic number.

918511323115819 is a deficient number, since it is larger than the sum of its proper divisors (11626725609141).

918511323115819 is a wasteful number, since it uses less digits than its factorization.

918511323115819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11626725609140.

The product of its digits is 2332800, while the sum is 58.

The spelling of 918511323115819 in words is "nine hundred eighteen trillion, five hundred eleven billion, three hundred twenty-three million, one hundred fifteen thousand, eight hundred nineteen".