64046821621209 has 16 divisors (see below), whose sum is σ = 97603579941888. Its totient is φ = 36595025088912.

The previous prime is 64046821621183. The next prime is 64046821621213. The reversal of 64046821621209 is 90212612864046.

It is not a de Polignac number, because 64046821621209 - 2⁸ = 64046821620953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64046821621219) 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 15 ways as a sum of consecutive naturals, for example, 131363157 + ... + 131849810.

It is an arithmetic number, because the mean of its divisors is an integer number (6100223746368).

Almost surely, 2^{64046821621209} is an apocalyptic number.

It is an amenable number.

64046821621209 is a deficient number, since it is larger than the sum of its proper divisors (33556758320679).

64046821621209 is a wasteful number, since it uses less digits than its factorization.

64046821621209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263224564.

The product of its (nonzero) digits is 1990656, while the sum is 51.

The spelling of 64046821621209 in words is "sixty-four trillion, forty-six billion, eight hundred twenty-one million, six hundred twenty-one thousand, two hundred nine".