616656419 has 8 divisors (see below), whose sum is σ = 687295440. Its totient is φ = 549835776.

The previous prime is 616656389. The next prime is 616656437. The reversal of 616656419 is 914656616.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-616656419 is a prime.

It is a super-2 number, since 2×616656419² = 760530278187807122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 616656419.

It is not an unprimeable number, because it can be changed into a prime (616656479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 954254 + ... + 954899.

It is an arithmetic number, because the mean of its divisors is an integer number (85911930).

Almost surely, 2^616656419 is an apocalyptic number.

616656419 is a deficient number, since it is larger than the sum of its proper divisors (70639021).

616656419 is a wasteful number, since it uses less digits than its factorization.

616656419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1909189.

The product of its digits is 233280, while the sum is 44.

The square root of 616656419 is about 24832.5677085556. The cubic root of 616656419 is about 851.1662970147.

The spelling of 616656419 in words is "six hundred sixteen million, six hundred fifty-six thousand, four hundred nineteen".