616065649 has 8 divisors (see below), whose sum is σ = 645524352. Its totient is φ = 586829760.

The previous prime is 616065623. The next prime is 616065673. The reversal of 616065649 is 946560616.

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 616065649 - 2⁷ = 616065521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616065679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50029 + ... + 61114.

It is an arithmetic number, because the mean of its divisors is an integer number (80690544).

Almost surely, 2^616065649 is an apocalyptic number.

It is an amenable number.

616065649 is a deficient number, since it is larger than the sum of its proper divisors (29458703).

616065649 is a wasteful number, since it uses less digits than its factorization.

616065649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111407.

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 616065649 is about 24820.6697935410. The cubic root of 616065649 is about 850.8943983465.

The spelling of 616065649 in words is "six hundred sixteen million, sixty-five thousand, six hundred forty-nine".