64493239938 has 8 divisors (see below), whose sum is σ = 128986479888. Its totient is φ = 21497746644.

The previous prime is 64493239919. The next prime is 64493239939. The reversal of 64493239938 is 83993239446.

It is a sphenic number, since it is the product of 3 distinct primes.

64493239938 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (64493239939) 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, 5374436656 + ... + 5374436667.

It is an arithmetic number, because the mean of its divisors is an integer number (16123309986).

Almost surely, 2^64493239938 is an apocalyptic number.

64493239938 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64493239938 is a wasteful number, since it uses less digits than its factorization.

64493239938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10748873328.

The product of its digits is 30233088, while the sum is 60.

The spelling of 64493239938 in words is "sixty-four billion, four hundred ninety-three million, two hundred thirty-nine thousand, nine hundred thirty-eight".