64664846646 has 32 divisors (see below), whose sum is σ = 132864523008. Its totient is φ = 20966156640.

The previous prime is 64664846593. The next prime is 64664846669.

64664846646 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 64664846646.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 737961 + ... + 820923.

It is an arithmetic number, because the mean of its divisors is an integer number (4152016344).

Almost surely, 2^64664846646 is an apocalyptic number.

64664846646 is an abundant number, since it is smaller than the sum of its proper divisors (68199676362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64664846646 is a wasteful number, since it uses less digits than its factorization.

64664846646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86516.

The product of its digits is 95551488, while the sum is 60.

The spelling of 64664846646 in words is "sixty-four billion, six hundred sixty-four million, eight hundred forty-six thousand, six hundred forty-six".