64642422226223 has 4 divisors (see below), whose sum is σ = 65862090570168. Its totient is φ = 63422753882280.

The previous prime is 64642422226199. The next prime is 64642422226289. The reversal of 64642422226223 is 32262222424646.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64642422226223 - 2⁶ = 64642422226159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64642428226223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 609834171893 + ... + 609834171998.

It is an arithmetic number, because the mean of its divisors is an integer number (16465522642542).

Almost surely, 2^{64642422226223} is an apocalyptic number.

64642422226223 is a deficient number, since it is larger than the sum of its proper divisors (1219668343945).

64642422226223 is a wasteful number, since it uses less digits than its factorization.

64642422226223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219668343944.

The product of its digits is 5308416, while the sum is 47.

The spelling of 64642422226223 in words is "sixty-four trillion, six hundred forty-two billion, four hundred twenty-two million, two hundred twenty-six thousand, two hundred twenty-three".