616791813 has 48 divisors (see below), whose sum is σ = 977645760. Its totient is φ = 344424960.

The previous prime is 616791811. The next prime is 616791821. The reversal of 616791813 is 318197616.

616791813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 616791813 - 2¹ = 616791811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616791811) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 253981 + ... + 256397.

It is an arithmetic number, because the mean of its divisors is an integer number (20367620).

Almost surely, 2^616791813 is an apocalyptic number.

It is an amenable number.

616791813 is a deficient number, since it is larger than the sum of its proper divisors (360853947).

616791813 is a wasteful number, since it uses less digits than its factorization.

616791813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2498 (or 2487 counting only the distinct ones).

The product of its digits is 54432, while the sum is 42.

The square root of 616791813 is about 24835.2936966729. The cubic root of 616791813 is about 851.2285869019.

The spelling of 616791813 in words is "six hundred sixteen million, seven hundred ninety-one thousand, eight hundred thirteen".