64684848646 has 24 divisors (see below), whose sum is σ = 107705791872. Its totient is φ = 29111082000.

The previous prime is 64684848611. The next prime is 64684848647.

64684848646 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 (64684848647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1298790 + ... + 1347673.

It is an arithmetic number, because the mean of its divisors is an integer number (4487741328).

Almost surely, 2^64684848646 is an apocalyptic number.

64684848646 is a deficient number, since it is larger than the sum of its proper divisors (43020943226).

64684848646 is a wasteful number, since it uses less digits than its factorization.

64684848646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2646588 (or 2646577 counting only the distinct ones).

The product of its digits is 169869312, while the sum is 64.

The spelling of 64684848646 in words is "sixty-four billion, six hundred eighty-four million, eight hundred forty-eight thousand, six hundred forty-six".