5677864821 has 6 divisors (see below), whose sum is σ = 8201360310. Its totient is φ = 3785243208.

The previous prime is 5677864813. The next prime is 5677864889. The reversal of 5677864821 is 1284687765.

5677864821 is a `hidden beast` number, since 567 + 78 + 6 + 4 + 8 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5597134596 + 80730225 = 74814^2 + 8985^2 .

It is not a de Polignac number, because 5677864821 - 2³ = 5677864813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5677864021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 315436926 + ... + 315436943.

It is an arithmetic number, because the mean of its divisors is an integer number (1366893385).

Almost surely, 2^5677864821 is an apocalyptic number.

It is an amenable number.

5677864821 is a deficient number, since it is larger than the sum of its proper divisors (2523495489).

5677864821 is a wasteful number, since it uses less digits than its factorization.

5677864821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630873875 (or 630873872 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 54.

The square root of 5677864821 is about 75351.6079523191. The cubic root of 5677864821 is about 1784.0006825533. Note that the first 3 decimals are identical.

The spelling of 5677864821 in words is "five billion, six hundred seventy-seven million, eight hundred sixty-four thousand, eight hundred twenty-one".