64244722217 has 16 divisors (see below), whose sum is σ = 70237585152. Its totient is φ = 58402460160.

The previous prime is 64244722159. The next prime is 64244722271. The reversal of 64244722217 is 71222744246.

64244722217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 64244722217 - 2¹⁰ = 64244721193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64244722517) 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, 4592768 + ... + 4606734.

It is an arithmetic number, because the mean of its divisors is an integer number (4389849072).

Almost surely, 2^64244722217 is an apocalyptic number.

64244722217 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

64244722217 is a deficient number, since it is larger than the sum of its proper divisors (5992862935).

64244722217 is a wasteful number, since it uses less digits than its factorization.

64244722217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19328.

The product of its digits is 301056, while the sum is 41.

The spelling of 64244722217 in words is "sixty-four billion, two hundred forty-four million, seven hundred twenty-two thousand, two hundred seventeen".