64730530368 has 252 divisors, whose sum is σ = 216139311180. Its totient is φ = 18467979264.

The previous prime is 64730530367. The next prime is 64730530379. The reversal of 64730530368 is 86303503746.

It can be written as a sum of positive squares in 2 ways, for example, as 40372061184 + 24358469184 = 200928^2 + 156072^2 .

It is a tau number, because it is divible by the number of its divisors (252).

It is not an unprimeable number, because it can be changed into a prime (64730530363) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 28476880 + ... + 28479152.

Almost surely, 2^64730530368 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 64730530368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108069655590).

64730530368 is an abundant number, since it is smaller than the sum of its proper divisors (151408780812).

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

64730530368 is a wasteful number, since it uses less digits than its factorization.

64730530368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3314 (or 3294 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 45.

The spelling of 64730530368 in words is "sixty-four billion, seven hundred thirty million, five hundred thirty thousand, three hundred sixty-eight".