618093616509 has 20 divisors (see below), whose sum is σ = 924003613500. Its totient is φ = 411759573120.

The previous prime is 618093616489. The next prime is 618093616531. The reversal of 618093616509 is 905616390816.

618093616509 is a `hidden beast` number, since 6 + 18 + 0 + 9 + 3 + 616 + 5 + 0 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 233100668025 + 384992948484 = 482805^2 + 620478^2 .

It is not a de Polignac number, because 618093616509 - 2⁷ = 618093616381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618093616589) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2693134 + ... + 2913615.

It is an arithmetic number, because the mean of its divisors is an integer number (46200180675).

Almost surely, 2^618093616509 is an apocalyptic number.

It is an amenable number.

618093616509 is a deficient number, since it is larger than the sum of its proper divisors (305909996991).

618093616509 is a wasteful number, since it uses less digits than its factorization.

618093616509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5608122 (or 5608113 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 54.

The spelling of 618093616509 in words is "six hundred eighteen billion, ninety-three million, six hundred sixteen thousand, five hundred nine".