616854861 has 24 divisors (see below), whose sum is σ = 1045825664. Its totient is φ = 342960480.

The previous prime is 616854859. The next prime is 616854869. The reversal of 616854861 is 168458616.

616854861 is a `hidden beast` number, since 6 + 168 + 5 + 486 + 1 = 666.

It is not a de Polignac number, because 616854861 - 2¹ = 616854859 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616854869) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129985 + ... + 134646.

Almost surely, 2^616854861 is an apocalyptic number.

It is an amenable number.

616854861 is a deficient number, since it is larger than the sum of its proper divisors (428970803).

616854861 is a wasteful number, since it uses less digits than its factorization.

616854861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264681 (or 264678 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 616854861 is about 24836.5629868547. The cubic root of 616854861 is about 851.2575898978.

The spelling of 616854861 in words is "six hundred sixteen million, eight hundred fifty-four thousand, eight hundred sixty-one".