64105442321 has 4 divisors (see below), whose sum is σ = 64170130944. Its totient is φ = 64040753700.

The previous prime is 64105442311. The next prime is 64105442329. The reversal of 64105442321 is 12324450146.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64105442321 - 2¹⁰ = 64105441297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64105442329) 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, 32342825 + ... + 32344806.

It is an arithmetic number, because the mean of its divisors is an integer number (16042532736).

Almost surely, 2^64105442321 is an apocalyptic number.

It is an amenable number.

64105442321 is a deficient number, since it is larger than the sum of its proper divisors (64688623).

64105442321 is an equidigital number, since it uses as much as digits as its factorization.

64105442321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64688622.

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 64105442321 its reverse (12324450146), we get a palindrome (76429892467).

The spelling of 64105442321 in words is "sixty-four billion, one hundred five million, four hundred forty-two thousand, three hundred twenty-one".