616398189 has 32 divisors (see below), whose sum is σ = 954405504. Its totient is φ = 349716480.

The previous prime is 616398173. The next prime is 616398227. The reversal of 616398189 is 981893616.

It is not a de Polignac number, because 616398189 - 2⁴ = 616398173 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616398989) 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 31 ways as a sum of consecutive naturals, for example, 105427 + ... + 111119.

It is an arithmetic number, because the mean of its divisors is an integer number (29825172).

Almost surely, 2^616398189 is an apocalyptic number.

It is an amenable number.

616398189 is a deficient number, since it is larger than the sum of its proper divisors (338007315).

616398189 is a wasteful number, since it uses less digits than its factorization.

616398189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5917.

The product of its digits is 559872, while the sum is 51.

The square root of 616398189 is about 24827.3677420704. The cubic root of 616398189 is about 851.0474694397.

The spelling of 616398189 in words is "six hundred sixteen million, three hundred ninety-eight thousand, one hundred eighty-nine".