616834809 has 12 divisors (see below), whose sum is σ = 898000896. Its totient is φ = 407984472.

The previous prime is 616834747. The next prime is 616834811. The reversal of 616834809 is 908438616.

616834809 is a `hidden beast` number, since 6 + 168 + 3 + 480 + 9 = 666.

It is not a de Polignac number, because 616834809 - 2¹² = 616830713 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (616833809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 268689 + ... + 270974.

It is an arithmetic number, because the mean of its divisors is an integer number (74833408).

Almost surely, 2^616834809 is an apocalyptic number.

It is an amenable number.

616834809 is a deficient number, since it is larger than the sum of its proper divisors (281166087).

616834809 is a wasteful number, since it uses less digits than its factorization.

616834809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539796 (or 539793 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 616834809 is about 24836.1593045302. The cubic root of 616834809 is about 851.2483659009.

The spelling of 616834809 in words is "six hundred sixteen million, eight hundred thirty-four thousand, eight hundred nine".