64688514336 has 144 divisors (see below), whose sum is σ = 186690722400. Its totient is φ = 21243202560.

The previous prime is 64688514301. The next prime is 64688514349. The reversal of 64688514336 is 63341588646.

64688514336 is a `hidden beast` number, since 6 + 46 + 88 + 514 + 3 + 3 + 6 = 666.

64688514336 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35718871 + ... + 35720681.

It is an arithmetic number, because the mean of its divisors is an integer number (1296463350).

Almost surely, 2^64688514336 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 64688514336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93345361200).

64688514336 is an abundant number, since it is smaller than the sum of its proper divisors (122002208064).

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

64688514336 is a wasteful number, since it uses less digits than its factorization.

64688514336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3599 (or 3588 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 54.

The spelling of 64688514336 in words is "sixty-four billion, six hundred eighty-eight million, five hundred fourteen thousand, three hundred thirty-six".