64221606244 has 12 divisors (see below), whose sum is σ = 112481397868. Its totient is φ = 32084064000.

The previous prime is 64221606221. The next prime is 64221606247. The reversal of 64221606244 is 44260612246.

It can be written as a sum of positive squares in 2 ways, for example, as 32630809600 + 31590796644 = 180640^2 + 177738^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (64221606247) 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 3 ways as a sum of consecutive naturals, for example, 6679377 + ... + 6688984.

Almost surely, 2^64221606244 is an apocalyptic number.

It is an amenable number.

64221606244 is a deficient number, since it is larger than the sum of its proper divisors (48259791624).

64221606244 is a wasteful number, since it uses less digits than its factorization.

64221606244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13369566 (or 13369564 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 37.

The spelling of 64221606244 in words is "sixty-four billion, two hundred twenty-one million, six hundred six thousand, two hundred forty-four".