83664446638 has 16 divisors (see below), whose sum is σ = 126471145680. Its totient is φ = 41507481600.

The previous prime is 83664446611. The next prime is 83664446639.

It is a happy number.

83664446638 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83664446639) 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 7 ways as a sum of consecutive naturals, for example, 2641198 + ... + 2672686.

It is an arithmetic number, because the mean of its divisors is an integer number (7904446605).

Almost surely, 2^83664446638 is an apocalyptic number.

83664446638 is a deficient number, since it is larger than the sum of its proper divisors (42806699042).

83664446638 is a wasteful number, since it uses less digits than its factorization.

83664446638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41763.

The product of its digits is 47775744, while the sum is 58.

The spelling of 83664446638 in words is "eighty-three billion, six hundred sixty-four million, four hundred forty-six thousand, six hundred thirty-eight".