64394398796 has 288 divisors, whose sum is σ = 152518262400. Its totient is φ = 23629584384.

The previous prime is 64394398793. The next prime is 64394398823. The reversal of 64394398796 is 69789349346.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (64394398793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 470032040 + ... + 470032176.

It is an arithmetic number, because the mean of its divisors is an integer number (529577300).

Almost surely, 2^64394398796 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64394398796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76259131200).

64394398796 is an abundant number, since it is smaller than the sum of its proper divisors (88123863604).

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

64394398796 is a wasteful number, since it uses less digits than its factorization.

64394398796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286 (or 251 counting only the distinct ones).

The product of its digits is 211631616, while the sum is 68.

The spelling of 64394398796 in words is "sixty-four billion, three hundred ninety-four million, three hundred ninety-eight thousand, seven hundred ninety-six".