64507995648 has 200 divisors, whose sum is σ = 194352183432. Its totient is φ = 21300240384.

The previous prime is 64507995631. The next prime is 64507995707. The reversal of 64507995648 is 84659970546.

64507995648 is a `hidden beast` number, since 6 + 450 + 7 + 99 + 56 + 48 = 666.

It is a super-2 number, since 2×64507995648² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4430236 + ... + 4444772.

Almost surely, 2^64507995648 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 64507995648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97176091716).

64507995648 is an abundant number, since it is smaller than the sum of its proper divisors (129844187784).

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

64507995648 is a wasteful number, since it uses less digits than its factorization.

64507995648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14674 (or 14649 counting only the distinct ones).

The product of its (nonzero) digits is 65318400, while the sum is 63.

The spelling of 64507995648 in words is "sixty-four billion, five hundred seven million, nine hundred ninety-five thousand, six hundred forty-eight".