64743278208 has 96 divisors (see below), whose sum is σ = 200051832960. Its totient is φ = 18498074112.

The previous prime is 64743278207. The next prime is 64743278239. The reversal of 64743278208 is 80287234746.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (64743278207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1701616 + ... + 1739247.

It is an arithmetic number, because the mean of its divisors is an integer number (2083873260).

Almost surely, 2^64743278208 is an apocalyptic number.

It is an amenable number.

64743278208 is an abundant number, since it is smaller than the sum of its proper divisors (135308554752).

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

64743278208 is a wasteful number, since it uses less digits than its factorization.

64743278208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3440894 (or 3440875 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 51.

The spelling of 64743278208 in words is "sixty-four billion, seven hundred forty-three million, two hundred seventy-eight thousand, two hundred eight".