64072011648 has 128 divisors (see below), whose sum is σ = 176299084800. Its totient is φ = 20592875520.

The previous prime is 64072011617. The next prime is 64072011719. The reversal of 64072011648 is 84611027046.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9161433 + ... + 9168423.

It is an arithmetic number, because the mean of its divisors is an integer number (1377336600).

Almost surely, 2^64072011648 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 64072011648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88149542400).

64072011648 is an abundant number, since it is smaller than the sum of its proper divisors (112227073152).

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

64072011648 is a wasteful number, since it uses less digits than its factorization.

64072011648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7860 (or 7848 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The spelling of 64072011648 in words is "sixty-four billion, seventy-two million, eleven thousand, six hundred forty-eight".