64355522320 has 40 divisors (see below), whose sum is σ = 158428156824. Its totient is φ = 24227960832.

The previous prime is 64355522263. The next prime is 64355522327. The reversal of 64355522320 is 2322555346.

It can be written as a sum of positive squares in 4 ways, for example, as 25744844304 + 38610678016 = 160452^2 + 196496^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 64355522320.

It is not an unprimeable number, because it can be changed into a prime (64355522327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23658759 + ... + 23661478.

Almost surely, 2^64355522320 is an apocalyptic number.

It is an amenable number.

64355522320 is an abundant number, since it is smaller than the sum of its proper divisors (94072634504).

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

64355522320 is a wasteful number, since it uses less digits than its factorization.

64355522320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47320267 (or 47320261 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 37.

The spelling of 64355522320 in words is "sixty-four billion, three hundred fifty-five million, five hundred twenty-two thousand, three hundred twenty".