616489999 has 16 divisors (see below), whose sum is σ = 654994368. Its totient is φ = 579059712.

The previous prime is 616489987. The next prime is 616490029. The reversal of 616489999 is 999984616.

It is a cyclic number.

It is not a de Polignac number, because 616489999 - 2⁹ = 616489487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616489949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 304639 + ... + 306655.

It is an arithmetic number, because the mean of its divisors is an integer number (40937148).

Almost surely, 2^616489999 is an apocalyptic number.

616489999 is a deficient number, since it is larger than the sum of its proper divisors (38504369).

616489999 is a wasteful number, since it uses less digits than its factorization.

616489999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2274.

The product of its digits is 7558272, while the sum is 61.

The square root of 616489999 is about 24829.2166408850. The cubic root of 616489999 is about 851.0897206936.

The spelling of 616489999 in words is "six hundred sixteen million, four hundred eighty-nine thousand, nine hundred ninety-nine".