64703904768 has 264 divisors, whose sum is σ = 200029564800. Its totient is φ = 20083286016.

The previous prime is 64703904767. The next prime is 64703904803. The reversal of 64703904768 is 86740930746.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64703904767) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10328005 + ... + 10334267.

Almost surely, 2^64703904768 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 64703904768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100014782400).

64703904768 is an abundant number, since it is smaller than the sum of its proper divisors (135325660032).

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

64703904768 is a wasteful number, since it uses less digits than its factorization.

64703904768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6367 (or 6346 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 54.

The spelling of 64703904768 in words is "sixty-four billion, seven hundred three million, nine hundred four thousand, seven hundred sixty-eight".