64840323200 has 48 divisors (see below), whose sum is σ = 160175868810. Its totient is φ = 25936128000.

The previous prime is 64840323157. The next prime is 64840323209. The reversal of 64840323200 is 232304846.

It can be written as a sum of positive squares in 3 ways, for example, as 63290483776 + 1549839424 = 251576^2 + 39368^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (64840323209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10128101 + ... + 10134500.

Almost surely, 2^64840323200 is an apocalyptic number.

It is an amenable number.

64840323200 is an abundant number, since it is smaller than the sum of its proper divisors (95335545610).

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

64840323200 is a wasteful number, since it uses less digits than its factorization.

64840323200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20262625 (or 20262608 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The spelling of 64840323200 in words is "sixty-four billion, eight hundred forty million, three hundred twenty-three thousand, two hundred".