618923543085 has 24 divisors (see below), whose sum is σ = 1072819143864. Its totient is φ = 330086914560.

The previous prime is 618923543059. The next prime is 618923543107. The reversal of 618923543085 is 580345329816.

618923543085 is a `hidden beast` number, since 6 + 1 + 8 + 92 + 3 + 543 + 0 + 8 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 173471417001 + 445452126084 = 416499^2 + 667422^2 .

It is not a de Polignac number, because 618923543085 - 2⁸ = 618923542829 is a prime.

It is a super-3 number, since 3×618923543085³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 4874769 + ... + 5000121.

It is an arithmetic number, because the mean of its divisors is an integer number (44700797661).

Almost surely, 2^618923543085 is an apocalyptic number.

It is an amenable number.

618923543085 is a deficient number, since it is larger than the sum of its proper divisors (453895600779).

618923543085 is a wasteful number, since it uses less digits than its factorization.

618923543085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235085 (or 235082 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 54.

The spelling of 618923543085 in words is "six hundred eighteen billion, nine hundred twenty-three million, five hundred forty-three thousand, eighty-five".