64361660416 has 51 divisors (see below), whose sum is σ = 128852361183. Its totient is φ = 32148357120.

The previous prime is 64361660401. The next prime is 64361660417. The reversal of 64361660416 is 61406616346.

The square root of 64361660416 is 253696.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64361660417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 64945681 + ... + 64946671.

Almost surely, 2^64361660416 is an apocalyptic number.

64361660416 is the 253696-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64361660416

64361660416 is an abundant number, since it is smaller than the sum of its proper divisors (64490700767).

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

64361660416 is an frugal number, since it uses more digits than its factorization.

64361660416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2014 (or 993 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 43.

The spelling of 64361660416 in words is "sixty-four billion, three hundred sixty-one million, six hundred sixty thousand, four hundred sixteen".