64914677568 has 168 divisors, whose sum is σ = 201026433608. Its totient is φ = 19909214208.

The previous prime is 64914677557. The next prime is 64914677603. The reversal of 64914677568 is 86577641946.

It is a happy number.

64914677568 is a `hidden beast` number, since 6 + 4 + 9 + 1 + 4 + 67 + 7 + 568 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 14526998784 + 50387678784 = 120528^2 + 224472^2 .

It is a congruent number.

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, 2329896 + ... + 2357592.

Almost surely, 2^64914677568 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 64914677568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100513216804).

64914677568 is an abundant number, since it is smaller than the sum of its proper divisors (136111756040).

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

64914677568 is a wasteful number, since it uses less digits than its factorization.

64914677568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28041 (or 28028 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 63.

The spelling of 64914677568 in words is "sixty-four billion, nine hundred fourteen million, six hundred seventy-seven thousand, five hundred sixty-eight".