64659888356 has 24 divisors (see below), whose sum is σ = 130263724416. Its totient is φ = 27509106240.

The previous prime is 64659888353. The next prime is 64659888379. The reversal of 64659888356 is 65388895646.

It is not an unprimeable number, because it can be changed into a prime (64659888353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8424200 + ... + 8431871.

It is an arithmetic number, because the mean of its divisors is an integer number (5427655184).

Almost surely, 2^64659888356 is an apocalyptic number.

It is an amenable number.

64659888356 is an abundant number, since it is smaller than the sum of its proper divisors (65603836060).

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

64659888356 is a wasteful number, since it uses less digits than its factorization.

64659888356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16856219 (or 16856217 counting only the distinct ones).

The product of its digits is 298598400, while the sum is 68.

The spelling of 64659888356 in words is "sixty-four billion, six hundred fifty-nine million, eight hundred eighty-eight thousand, three hundred fifty-six".