64228069639 has 4 divisors (see below), whose sum is σ = 64240938256. Its totient is φ = 64215201024.

The previous prime is 64228069589. The next prime is 64228069651. The reversal of 64228069639 is 93696082246.

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 64228069639 - 2⁹ = 64228069127 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64228069639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64228009639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6426819 + ... + 6436804.

It is an arithmetic number, because the mean of its divisors is an integer number (16060234564).

Almost surely, 2^64228069639 is an apocalyptic number.

64228069639 is a deficient number, since it is larger than the sum of its proper divisors (12868617).

64228069639 is a wasteful number, since it uses less digits than its factorization.

64228069639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12868616.

The product of its (nonzero) digits is 6718464, while the sum is 55.

The spelling of 64228069639 in words is "sixty-four billion, two hundred twenty-eight million, sixty-nine thousand, six hundred thirty-nine".