64221775673 has 16 divisors (see below), whose sum is σ = 73858867200. Its totient is φ = 55297952400.

The previous prime is 64221775649. The next prime is 64221775699. The reversal of 64221775673 is 37657712246.

It is a cyclic number.

It is not a de Polignac number, because 64221775673 - 2³² = 59926808377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64221775613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1987523 + ... + 2019576.

It is an arithmetic number, because the mean of its divisors is an integer number (4616179200).

Almost surely, 2^64221775673 is an apocalyptic number.

It is an amenable number.

64221775673 is a deficient number, since it is larger than the sum of its proper divisors (9637091527).

64221775673 is a wasteful number, since it uses less digits than its factorization.

64221775673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4007188.

The product of its digits is 2963520, while the sum is 50.

The spelling of 64221775673 in words is "sixty-four billion, two hundred twenty-one million, seven hundred seventy-five thousand, six hundred seventy-three".