64424509439 has 4 divisors (see below), whose sum is σ = 65480649000. Its totient is φ = 63368369880.

The previous prime is 64424509417. The next prime is 64424509451. The reversal of 64424509439 is 93490542446.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64424509439 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64424509469) 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, 528069689 + ... + 528069810.

It is an arithmetic number, because the mean of its divisors is an integer number (16370162250).

Almost surely, 2^64424509439 is an apocalyptic number.

64424509439 is a deficient number, since it is larger than the sum of its proper divisors (1056139561).

64424509439 is a wasteful number, since it uses less digits than its factorization.

64424509439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056139560.

The product of its (nonzero) digits is 3732480, while the sum is 50.

The spelling of 64424509439 in words is "sixty-four billion, four hundred twenty-four million, five hundred nine thousand, four hundred thirty-nine".