64195745328 has 480 divisors, whose sum is σ = 219044105280. Its totient is φ = 17288847360.

The previous prime is 64195745323. The next prime is 64195745399. The reversal of 64195745328 is 82354759146.

It is a happy number.

64195745328 is a `hidden beast` number, since 6 + 4 + 19 + 574 + 53 + 2 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (64195745323) 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, 83047150 + ... + 83047922.

It is an arithmetic number, because the mean of its divisors is an integer number (456341886).

Almost surely, 2^64195745328 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 64195745328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109522052640).

64195745328 is an abundant number, since it is smaller than the sum of its proper divisors (154848359952).

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

64195745328 is a wasteful number, since it uses less digits than its factorization.

64195745328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957 (or 948 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 54.

The spelling of 64195745328 in words is "sixty-four billion, one hundred ninety-five million, seven hundred forty-five thousand, three hundred twenty-eight".