616851 has 6 divisors (see below), whose sum is σ = 891020. Its totient is φ = 411228.

The previous prime is 616849. The next prime is 616871. The reversal of 616851 is 158616.

616851 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 616851 - 2¹ = 616849 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616841) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34261 + ... + 34278.

2⁶¹⁶⁸⁵¹ is an apocalyptic number.

616851 is a deficient number, since it is larger than the sum of its proper divisors (274169).

616851 is a wasteful number, since it uses less digits than its factorization.

616851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68545 (or 68542 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 616851 is about 785.3986249033. The cubic root of 616851 is about 85.1255813839.

The spelling of 616851 in words is "six hundred sixteen thousand, eight hundred fifty-one".