616387845385 has 8 divisors (see below), whose sum is σ = 796562754120. Its totient is φ = 455178716544.

The previous prime is 616387845377. The next prime is 616387845467. The reversal of 616387845385 is 583548783616.

It can be written as a sum of positive squares in 4 ways, for example, as 1915287696 + 614472557689 = 43764^2 + 783883^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 616387845385 - 2³ = 616387845377 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4741444900 + ... + 4741445029.

It is an arithmetic number, because the mean of its divisors is an integer number (99570344265).

Almost surely, 2^616387845385 is an apocalyptic number.

616387845385 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

616387845385 is a deficient number, since it is larger than the sum of its proper divisors (180174908735).

616387845385 is a wasteful number, since it uses less digits than its factorization.

616387845385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9482889947.

The product of its digits is 116121600, while the sum is 64.

The spelling of 616387845385 in words is "six hundred sixteen billion, three hundred eighty-seven million, eight hundred forty-five thousand, three hundred eighty-five".