64305831880000 has 140 divisors (see below), whose sum is σ = 159523776841572. Its totient is φ = 25711651840000.

The previous prime is 64305831879983. The next prime is 64305831880001. The reversal of 64305831880000 is 8813850346.

It can be written as a sum of positive squares in 10 ways, for example, as 25548334175296 + 38757497704704 = 5054536^2 + 6225552^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64305831880001) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 96347430 + ... + 97012570.

Almost surely, 2^{64305831880000} 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 64305831880000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79761888420786).

64305831880000 is an abundant number, since it is smaller than the sum of its proper divisors (95217944961572).

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

64305831880000 is an equidigital number, since it uses as much as digits as its factorization.

64305831880000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667590 (or 667565 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 46.

The spelling of 64305831880000 in words is "sixty-four trillion, three hundred five billion, eight hundred thirty-one million, eight hundred eighty thousand".