613919816 has 16 divisors (see below), whose sum is σ = 1152668400. Its totient is φ = 306541584.

The previous prime is 613919807. The next prime is 613919819. The reversal of 613919816 is 618919316.

It is a happy number.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (613919819) 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 3 ways as a sum of consecutive naturals, for example, 46010 + ... + 57833.

It is an arithmetic number, because the mean of its divisors is an integer number (72041775).

Almost surely, 2^613919816 is an apocalyptic number.

It is an amenable number.

613919816 is a deficient number, since it is larger than the sum of its proper divisors (538748584).

613919816 is a wasteful number, since it uses less digits than its factorization.

613919816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104588 (or 104584 counting only the distinct ones).

The product of its digits is 69984, while the sum is 44.

The square root of 613919816 is about 24777.4053524577. The cubic root of 613919816 is about 849.9053255569.

The spelling of 613919816 in words is "six hundred thirteen million, nine hundred nineteen thousand, eight hundred sixteen".