4639842866 has 8 divisors (see below), whose sum is σ = 6960110124. Its totient is φ = 2319806160.

The previous prime is 4639842847. The next prime is 4639842869. The reversal of 4639842866 is 6682489364.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4368549025 + 271293841 = 66095^2 + 16471^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (4639842869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7316 + ... + 96608.

Almost surely, 2^4639842866 is an apocalyptic number.

4639842866 is a deficient number, since it is larger than the sum of its proper divisors (2320267258).

4639842866 is a wasteful number, since it uses less digits than its factorization.

4639842866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115276.

The product of its digits is 11943936, while the sum is 56.

The square root of 4639842866 is about 68116.3920506657. The cubic root of 4639842866 is about 1667.8913548939.

The spelling of 4639842866 in words is "four billion, six hundred thirty-nine million, eight hundred forty-two thousand, eight hundred sixty-six".