64243105427 has 4 divisors (see below), whose sum is σ = 64260486216. Its totient is φ = 64225724640.

The previous prime is 64243105391. The next prime is 64243105429. The reversal of 64243105427 is 72450134246.

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 64243105427 - 2¹⁸ = 64242843283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64243105429) 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, 8684849 + ... + 8692242.

It is an arithmetic number, because the mean of its divisors is an integer number (16065121554).

Almost surely, 2^64243105427 is an apocalyptic number.

64243105427 is a deficient number, since it is larger than the sum of its proper divisors (17380789).

64243105427 is a wasteful number, since it uses less digits than its factorization.

64243105427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17380788.

The product of its (nonzero) digits is 161280, while the sum is 38.

The spelling of 64243105427 in words is "sixty-four billion, two hundred forty-three million, one hundred five thousand, four hundred twenty-seven".