64640446044600 has 96 divisors (see below), whose sum is σ = 200539884291120. Its totient is φ = 17224161822720.

The previous prime is 64640446044599. The next prime is 64640446044607. The reversal of 64640446044600 is 644064404646.

64640446044600 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 64640446044600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64640446044607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40753827 + ... + 42310226.

Almost surely, 2^{64640446044600} is an apocalyptic number.

64640446044600 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64640446044600 is an abundant number, since it is smaller than the sum of its proper divisors (135899438246520).

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

64640446044600 is a wasteful number, since it uses less digits than its factorization.

64640446044600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83065369 (or 83065360 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 48.

The spelling of 64640446044600 in words is "sixty-four trillion, six hundred forty billion, four hundred forty-six million, forty-four thousand, six hundred".