64863203328 has 520 divisors, whose sum is σ = 241672506240. Its totient is φ = 16840949760.

The previous prime is 64863203311. The next prime is 64863203329. The reversal of 64863203328 is 82330236846.

64863203328 is a `hidden beast` number, since 6 + 4 + 8 + 632 + 0 + 3 + 3 + 2 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64863203329) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 25545483 + ... + 25548021.

Almost surely, 2^64863203328 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 64863203328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120836253120).

64863203328 is an abundant number, since it is smaller than the sum of its proper divisors (176809302912).

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

64863203328 is a wasteful number, since it uses less digits than its factorization.

64863203328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2593 (or 2562 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 45.

The spelling of 64863203328 in words is "sixty-four billion, eight hundred sixty-three million, two hundred three thousand, three hundred twenty-eight".