618917622123 has 4 divisors (see below), whose sum is σ = 825223496168. Its totient is φ = 412611748080.

The previous prime is 618917622121. The next prime is 618917622161. The reversal of 618917622123 is 321226719816.

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

It is not a de Polignac number, because 618917622123 - 2¹ = 618917622121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (618917622121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103152937018 + ... + 103152937023.

It is an arithmetic number, because the mean of its divisors is an integer number (206305874042).

Almost surely, 2^618917622123 is an apocalyptic number.

618917622123 is a deficient number, since it is larger than the sum of its proper divisors (206305874045).

618917622123 is a wasteful number, since it uses less digits than its factorization.

618917622123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206305874044.

The product of its digits is 435456, while the sum is 48.

The spelling of 618917622123 in words is "six hundred eighteen billion, nine hundred seventeen million, six hundred twenty-two thousand, one hundred twenty-three".